This is a list of the events ofWorld War I in chronological order.
| Dates | Theater/Front/Campaign | Events |
|---|---|---|
| June 28 | Politics | Assassination of Archduke Franz Ferdinand, heir to the Austro-Hungarian throne, who was killed inSarajevo along with his wifeSophie, Duchess of Hohenberg, byGavrilo Princip, a Bosnian Serb.[1] |
| July 5 | Politics | Austria-Hungary seeks German support for a war against Serbia in case of Russian military intervention. TheGerman Empire gives assurances of support.[2] |
| July 23 | Politics | Beginning of the "Black Week". Austria-Hungary sendsan ultimatum to TheKingdom of Serbia. Serbia responds that night, agreeing to most but not all terms of the ultimatum. The Serbian response is seen as satisfactory by the Kaiser, but German diplomats do not pressure Austria to make peace.[3] (details) |
| July 24 | Balkan | Serbia mobilizes, expecting Austria to declare war after the refusal of the ultimatum. |
| July 25 | Eastern | Austria mobilizes against Serbia. Russia enters the period preparatory to war (partial mobilization). |
| July 28 | Politics | To my peoples.Austria-Hungary declares war on Serbia.[4] |
| July 29 | Politics | Willy–Nicky correspondence.Wilhelm II, German Emperor andNicholas II of Russia communicate via telegram.[5] |
| July 30 | Politics | Germany sends Russia an ultimatum.[5] |
| July 31 | Politics | Sweden announces neutrality in the conflict betweenAustria-Hungary andSerbia.[6] |
| Politics | Russia mobilizes for war. | |
| August 1 | Politics | Germany declares war onRussia and mobilizes.[7][8][9] |
| Western | France mobilizes.[7] | |
| Politics | Italy declares its neutrality.[10] | |
| Politics | TheGerman–Ottoman alliance. Germany and theOttoman Empire sign a secret alliance treaty.[11] | |
| August 2 | Western | Germany invadesLuxembourg.[12] (details) |
| Western | Skirmish at Joncherey, first military action on the Western Front.[13] | |
| August 2 – 26 | Western | Germany besieges and captures fortifiedLongwy, "the Iron Gate to Paris", near the Luxembourg border, opening France to mass German invasion. |
| August 3 | Politics | Germany declares war onFrance.[14]Belgium denies permission for German forces to pass through to the French border.[15][16] |
| Politics | Switzerland declares its neutrality and mobilises for defence purposes.[17][18] | |
| Politics | Sweden declares neutrality in the conflict betweenGermany,Russia andFrance.[6] | |
| August 4 | Western | TheGerman invasion of Belgium (1914)[19] to outflank the French army. |
| Politics | Britain protests against the violation of Belgian neutrality, guaranteed by theTreaty of London (1839). The German Chancellor replies that the treaty is just achiffon de papier (a scrap of paper). The United Kingdom declares war on Germany, automatically including all dominions, colonies, etc. of theBritish Empire including Canada, Australia, andBritish India.[20] (details) | |
| Politics | The United States declares neutrality. | |
| August 5 – 16 | Western | Battle of Liège. The Germans besiege and then capture the fortresses ofLiège, Belgium. |
| August 5 | Asian and Pacific | First weapon fired inMelbourne,Australia, by Australian troops.[21] |
| Asian and Pacific | German SteamerSSPfalz surrenders after being fired on byFort Nepean, south ofMelbourne,Australia.[22] (details) | |
| Politics | Montenegro declares war onAustria-Hungary.[23] | |
| Middle Eastern | TheOttoman Empire closes theDardanelles. | |
| August 6 | Politics | Austria-Hungary declares war onRussia.[24] |
| Politics | Kingdom of Serbia declares war onGermany.[24] | |
| August 7 | ||
| Politics | Spain declares "the strictest neutrality."[25][26] (details) | |
| August 7 – September 6 | Western | Battle of the Frontiers. The Germans obtain a victory against the British Expeditionary Force and France's Fifth Army. |
| August 7 – 10 | Western | Battle of Mulhouse, a phase of the Battle of the Frontiers. |
| August 8 | Politics | Montenegro declares war onGermany.[24] |
| Politics | Sweden andNorway declare neutrality in the general conflict. | |
| August 9 | African,Togoland | TheTogoland Campaign begins. |
| August 11 | Politics | France declares war on Austria-Hungary. |
| August 12 | Politics | The United Kingdom declares war on Austria-Hungary.[24][27] |
| Western | Battle of Halen, a phase of the Battle of the Frontiers. | |
| August 14 – 25 | Western | Battle of Lorraine, a phase of the Battle of the Frontiers. |
| August 14 – 24 | Western | Battle of Dinant, during the German invasion of Belgium. IncludingSack of Dinant (August 23). |
| August 15 | African,East African | German troops cross intoEast Africa Protectorate and occupyTaveta. (details) |
| August 15 – 24 | Balkan,Serbian | The Serbs defeat the Austro-Hungarians at theBattle of Cer.[28] |
| August 17 | Eastern | Battle of Stallupönen. The Russian army entersEast Prussia. |
| August 20 | Eastern | The Germans attack the Russians in East Prussia at theBattle of Gumbinnen. The attack is a failure in addition to being a deviation from the Schlieffen Plan.[29] |
| Western | The Germans occupyBrussels. | |
| Western | Battle of Morhange-Sarrebourg, a phase of the Battle of Lorraine. | |
| August 21 – 23 | Western | Battle of Charleroi, a phase of the Battle of the Frontiers. |
| August 21 – 23 | Western | Battle of the Ardennes, a phase of the Battle of the Frontiers. |
| August 23 | Politics | Japan declares war onGermany.[24] (details) |
| Western | Battle of Mons, a phase of the Battle of the Frontiers. | |
| August 23 – 30 | Eastern | Battle of Tannenberg: the Russian army undergoes a heavy defeat by the Germans.[30] |
| August 23 – September 11 | Eastern | Battle of Galicia. The Russians captureLviv. |
| August 23 – 25 | Eastern | Battle of Kraśnik, a phase of the Battle of Lemberg. The Austro-Hungarian First Army defeats the Russian Fourth Army.[31] |
| August 24 – 26 | Western | Action of Elouges |
| Western | Battle of the Trouée de Charmes, a phase of the Battle of Lorraine. | |
| August 24 – September 7 | Western | Siege of Maubeuge. The Germans besiege and capture the Maubeuge Fortress. |
| August 24 – September 5 | Western | The AlliedGreat Retreat to the River Marne. |
| August 25 | Politics | Japan declares war on Austria-Hungary.[24] |
| African,Kamerun | Battle of Tepe: The Kamerun campaign begins. | |
| August 26 | African,Togoland | British and French forces conquerTogoland, a German protectorate inWest Africa.[32] (details) |
| Western | Rearguard Affair of Le Grand Fayt | |
| August 26 | Western | Battle of Le Cateau results in an Allied retreat. |
| August 26 – 30 | Eastern | Battle of Gnila Lipa, a phase of the Battle of Lemberg. |
| August 26 – September 2 | Eastern | Battle of Komarów (1914), part of the Battle of Lemberg. |
| August 26, 1914 – February 18, 1916 | African,Kamerun | Siege of Mora |
| August 27 | Western | Rearguard Affair of Étreux |
| August 27 – November 7 | Asian and Pacific | Siege of Tsingtao: British and Japanese forces capture the German-controlled port ofQingdao inRepublic of China (1912–1949). |
| August 28 | Naval | TheRoyal Navy wins the FirstBattle of Heligoland Bight (1914) in theNorth Sea. |
| Politics | Austria-Hungary declares war onBelgium.[24] | |
| August 29 – 30 | Western | Battle of St. Quentin (1914), also known as Battle of Guise. Orderly Allied retreat. |
| August 29 – 31 | African,Kamerun | First Battle of Garua |
| August 29 – 30 | Asian and Pacific | Occupation of German Samoa.New Zealand occupies German Samoa (laterSamoa). |
| September 1 | Western | Affair of Néry |
| Politics | Saint Petersburg renamed Petrograd, removing German words "Burg" and "Sankt."[33] | |
| September 3 – 11 | Eastern | Austro-Hungarian defeat at theBattle of Rawa, a phase of the Battle of Lemberg. |
| September 5 | Naval,Atlantic | Britishscout cruiserHMSPathfinder (1904) is sunk byU-boatSMU-21 offScotland. |
| September 5–12 | Western | First Battle of the Marne. The German advance onParis is halted, marking the failure of theSchlieffen Plan.[34] |
| Western | Battle of the Ourcq, a phase of the First Battle of the Marne. | |
| Western | Battle of the Two Morins | |
| September 6 | African,Kamerun | Battle of Nsanakong |
| September 6–12 | Western | Battle of the Marshes of Saint-Gond, a phase of the First Battle of the Marne. |
| Western | Battle of Vitry, a phase of the First Battle of the Marne. | |
| Western | Battle of Revigny, a phase of the First Battle of the Marne. | |
| September 7 – September 24 | Balkan,Serbian | Battle of the Drina |
| September 7 | Asian and Pacific | Fanning Raid |
| September 7–14 | Eastern | First Battle of the Masurian Lakes: The Russian Army of the Neman withdraws from East Prussia with heavy casualties. |
| September 9 | Politics | Theobald von Bethmann Hollweg lays out Germany's war aims. (details) |
| September 11 | Asian and Pacific | Battle of Bita Paka |
| September 13 | African,South West Africa | South West Africa campaign. Troops fromSouth Africa begin invadingGerman South West Africa. |
| September 13–28 | Western | TheFirst Battle of the Aisne ends in a substantial draw. TheRace to the Sea begins. |
| September 14 | Politics | Erich von Falkenhayn replacesHelmuth von Moltke the Younger as German Chief of Staff. |
| September 14–17 | Asian and Pacific | Siege of Toma. Most German forces inGerman New Guinea surrender to the Australians then or over the following year. |
| September 15, 1914 - Feb 4, 1915 | African,South West Africa | Maritz rebellion.Boers leaderManie Maritz revolts in South Africa. |
| September 19 – October 11 | Western | Battle of Flirey |
| September 20 | Naval,African,East African | Battle of Zanzibar, German naval victory. |
| September 22 | Asian and Pacific | Bombardment of Papeete |
| Asian and Pacific | Bombardment of Madras. Germanlight cruiserSMS Emden attacksChennai. | |
| September 22–26 | Western | First Battle of Picardy |
| September 24 | Eastern | TheSiege of Przemyśl begins. |
| September 26 | African,South West Africa | Battle of Sandfontein |
| September 25–29 | Western | FirstBattle of Albert (1914) |
| September 28 – October 10 | Western | Siege of Antwerp (1914). The Germans besiege and captureAntwerp, Belgium. |
| September 29–30 | Asian and Pacific | Japan occupies theMarshall Islands. |
| September 29 – October 31 | Eastern | Battle of the Vistula River, also known as Battle of Warsaw. |
| October 1914 – July 11, 1915 | Naval,African,East African | Battle of Rufiji Delta, German cruiserSMSKönigsberg (1905) destroyed. |
| October 1–4 | Western | FirstBattle of Arras (1914) |
| October 9 – November 1 | Balkan,Serbian | Central powers control Belgrade. (details) |
| October 10 – November 2 | Western | Battle of La Bassée |
| October 12 – November 2 | Western | FirstBattle of Messines (1914) |
| October 13 – November 2 | Western | Battle of Armentières |
| October 16–31 | Western | Battle of the Yser. French and Belgian forces secure the coastline of Belgium.[35] |
| October 19 – November 22 | Western | TheFirst Battle of Ypres ends theRace to the Sea. The Germans are prevented from reachingCalais andDunkirk. |
| October 18, 1914 – July 9, 1915 | African,South West Africa | German campaign in Angola. Clashes between German and Portuguese forces in thePortuguese Angola-German South West Africa border, without declaration of war. |
| October 28 | Naval,Asian and Pacific | Battle of Penang. The German cruiser Emden sinks two British warships in theStrait of Malacca. |
| October 29 | Naval,Eastern | Black Sea raid. Ottoman warships bombard the Russian ports ofOdessa andSevastopol. |
| November 1 | Politics | Russia declares war on theOttoman Empire. |
| Naval | Battle of Coronel. Von Spee's German cruiser squadron defeats a Royal Navy squadron underChristopher Cradock offChile.[36] | |
| November 2 | Naval,Atlantic | TheUnited Kingdom begins the naval blockade ofGermany. (details) |
| Politics | Serbia declares war on the Ottoman Empire.[24] | |
| November 2–21 | Middle Eastern,Caucasian | Bergmann Offensive, first military engagement in theCaucasus of the First World War. |
| November 3 | Politics | Montenegro declares war on the Ottoman Empire. |
| African,East African | Battle of Kilimanjaro | |
| November 3–5 | African,East African | Von Lettow-Vorbeck's German colonial forces defeat the British at theBattle of Tanga, German East Africa. |
| November 5 | Politics | France and the United Kingdom[37] declare war on the Ottoman Empire.[24] |
| November 6–8 | Middle Eastern,Mesopotamian | Fao Landing, British and Indians besiege the fortress at Fao. |
| November 7 | Asian and Pacific | Japanese Forces capture the Naval Base at Tsingtao. (details) |
| November 11 | Politics | SultanMehmed V declaresJihad on theAllies of World War I.[38][39] |
| November 11–22 | Middle Eastern,Mesopotamian | Battle of Basra (1914) |
| November 11 – December 6 | Eastern | Battle of Łódź (1914) (also known asSilesian offensive). |
| November 13 | African,East African | Battle of El Herri: Worst French defeat inMorocco at the hands of theZayanes. |
| November 16 – December 15 | Balkan,Serbian | Battle of Kolubara, Austro-Hungarians withdraw from Serbia. |
| November 19 | Politics | Bolshevik representatives at theState Duma arrested and exiled toSiberia. |
| November 23 | Middle Eastern,Mesopotamian | Basra is occupied by theBritish. |
| December 1 – 13 | Eastern | Battle of Limanowa |
| December 3 – 9 | Middle Eastern,Mesopotamian | Battle of Qurna |
| December 8 | Naval | Battle of the Falkland Islands. Von Spee's German cruiser squadron is defeated by theRoyal Navy.[40] |
| December 10 | Western | Hill 60 (Ypres) captured by the Germans. |
| December 14 | Middle Eastern,Persian | Persian campaign (World War I). Ottomans occupy the Persian border town of Qatur as a bridgehead to the Caucasus, but withdraw after their defeat atSarıkamış. |
| December 16 | Naval,Atlantic | Raid on Scarborough, Hartlepool and Whitby. The German fleet shellsScarborough, North Yorkshire,Hartlepool, andWhitbyEngland.[41] |
| December 18–19 | Politics | Christian X, Gustaf V, and Haakon VII meet atMalmö to discuss neutrality, which leads toDenmark joining Sweden and Norway in neutrality.[42] |
| December 18 – 22 | Western | Battle of Givenchy |
| December 17, 1914 – January 13, 1915 | Western | First Battle of Artois |
| December 20 | Western | Fighting begins atPerthes, Ardennes. |
| December 20, 1914 – 17 March 1915 | Western | First Battle of Champagne |
| December 22 | Western | Fighting begins atNoyon. |
| December 22, 1914 – January 17, 1915 | Middle Eastern,Caucasian | The Russians win theBattle of Sarikamish, Caucasia.[43] |
| December 24 – 26 | Western | In some sectors of the Western Front, an unofficialChristmas truce is observed between German and British forces.[44] |
| December 25 – January 18, 1915 | Middle Eastern,Caucasian | Battle of Ardahan |
| Dates | Theater/Front/Campaign | Events |
|---|---|---|
| January 2 | Eastern | The Russian offensive in theCarpathians begins. It will continue until April 12. |
| January 4–11 | Middle Eastern,Persian | Ottomans occupyUrmia andTabriz by surprise. |
| January 18 | Politics | Japan attempts to impose itsTwenty-One Demands on neutral China. |
| January 18–19 | African,East African | Battle of Jassin. |
| January 19 – December 22 | Western | Battle of Hartmannswillerkopf, series of battles fought to control the peak. |
| January 24 | Naval | Battle of Dogger Bank between squadrons of the BritishGrand Fleet and the GermanHochseeflotte. |
| January 24–26 | African,East African | Chilembwe uprising led by John Chilembwe inNyasaland. |
| January 28 – February 3 | Middle Eastern,Sinai and Palestine | The Ottomans fail to capture theSuez Canal in theFirst Suez Offensive. |
| January 30 | Middle Eastern,Persian | The Russians take Tabriz. |
| January 31 | Eastern | Battle of Bolimov. First German use ofchemical weapons.[45] |
| February 4 | Naval,Atlantic | Germany beginsunrestricted submarine warfare against merchant vessels. |
| African,South West Africa | Jan Kemp surrenders. End of theMaritz Rebellion. | |
| African,South West Africa | Battle of Kakamas: German invasion of South Africa repelled. | |
| February 7–22 | Eastern | Second Battle of the Masurian Lakes. The Russian X Army is defeated. |
| February 15 | Asian and Pacific | Troops in Singapore mutiny against the British |
| February 19 | Middle Eastern,Gallipoli | British and French naval attack on theDardanelles.The Gallipoli Campaign begins.[46] |
| March 5 | Politics | Great Britain and France promise RussiaConstantinople. |
| March 7 | Middle Eastern,Persian | Ottomans retreat to Qotur, pushed by a Russian counteroffensive. |
| March 10 – March 13 | Western | Battle of Neuve Chapelle. After an initial success, a British offensive is halted. |
| March 14 | Naval | Battle of Más a Tierra. The last remnant of the GermanEast Asia Squadron is sunk and its crew interned in neutralChile. |
| March 18 | Naval,Middle Eastern,Gallipoli | Battle of 18 March. The British and French unsuccessfully try to force theDardanelles, losing 3 Pre-Dreadnought Battleships |
| March 22 | Eastern | TheSiege of Przemyśl ends. The Russians capture the fortress. |
| April 5 – May 5 | Western | First Battle of Woevre. |
| April 12–14 | Middle Eastern,Mesopotamian | Battle of Shaiba. |
| April 15 | Middle Eastern,Persian | Battle of Dilman |
| April 19 – May 17 | Middle Eastern,Caucasian | The Ottomans besiege the Armenian city ofVan. |
| April 22 – May 25 | Western | TheSecond Battle of Ypres, which ends in a stalemate.Germany first usespoison gas. |
| April 22–23 | Western | Battle of Gravenstafel, First stage of the Second Battle of Ypres. |
| April 24 | Politics | Deportation of Armenian intellectuals toAnkara, first act of theArmenian genocide. |
| April 24 – May 5 | Western | Battle of St Julien, part of the Second Battle of Ypres. |
| April 25 | Middle Eastern,Gallipoli | Allied forces land on Gallipoli, landing atAri Burnu, soon renamed Anzac Cove, andCape Helles.[47] (details) |
| April 26 | Politics | Treaty of London between the Entente andItaly.[citation needed] |
| African,South West Africa | Battle of Trekkopjes. | |
| April 28 | Middle Eastern,Gallipoli | First Battle of Krithia. The Allied advance is repelled.[48] |
| April 29 | African,Kamerun | Battle of Gurin. |
| May 1 | Eastern | TheGorlice-Tarnów Offensive begins: the German troops under General Mackensen break through the Russian lines inGalicia. |
| Middle Eastern,Gallipoli | Battle ofEski Hissarlik. | |
| May 3 | Middle Eastern,Gallipoli | Troops withdraw fromAnzac Cove. |
| Politics | Italy revokes its commitment toa defensive alliance with Germany and Austria-Hungary. | |
| May 6–8 | Middle Eastern,Gallipoli | Second Battle of Krithia. The Allied attempts at advancing are thwarted again.[49] |
| May 7 | Naval,Atlantic | The British linerLusitania is sunk by a German U-boat.[50] |
| May 8–13 | Western | Battle of Frezenberg Ridge, Part of the Second Battle of Ypres. |
| May 9 | Western | Beginning of theSecond Battle of Artois, with theBattle of Aubers |
| May 10 | Eastern | Troops fromHungary rout the Russians atJarosław. Lviv is again in Austrian hands. |
| May 11 | Middle Eastern,Gallipoli | Armistice called at Gallipoli to bury the dead. (details) |
| May 12 | African,South West Africa | Windhoek, capital of German South-West Africa, is occupied bySouth African troops.[51] |
| May 15–25 | Western | Battle of Festubert. |
| May 16 – June 23 | Eastern | Battle of Konary. |
| May 23 | Politics | Italy declares war onAustria-Hungary.[24] (details) |
| May 24–25 | Western | Battle of Bellewaarde, final phase of the Second Battle of Ypres. |
| May 31 – June 10 | African,Kamerun | Second Battle of Garua. |
| June–September | Eastern | TheRussian Great Retreat from Poland and Galicia. |
| June 4 | Middle Eastern,Gallipoli | Third Battle of Krithia. Yet another Allied failure.[49] |
| Eastern | The Russians leavePrzemyśl. (details) | |
| June 21–23 | African,East African | Battle of Bukoba. |
| June 22 | Eastern | Mackensen again breaks through the Russian lines in theLviv area. (details) |
| June 23 – July 7 | Italian | First Battle of the Isonzo. |
| June 27 | Eastern | The Austro-Hungarians re-enter Lviv. (details) |
| June 28 – July 5 | Middle Eastern,Gallipoli | The British win theBattle of Gully Ravine. |
| June 29 | African,Kamerun | Battle of Ngaundere |
| July 1 | Air | First aerial victory by a synchronized gun-armed fighter aircraft (details) |
| African,South West Africa | Battle of Otavi. | |
| July 9 | African,South West Africa | The German forces inSouth-West Africa surrender. |
| July 10–26 | Middle Eastern,Caucasian | Battle of Manzikert. |
| July 18 – August 3 | Italian | Second Battle of the Isonzo. |
| July 25 | Italian | Italians capture Cappuccio Wood. (details) |
| Air | FirstVictoria Cross awarded to a British combat pilot (details) | |
| July 27–31 | Middle Eastern,Caucasian | Battle of Kara Killisse. |
| August 5 | Eastern | The Germans occupyWarsaw. (details) |
| August 6–10 | Middle Eastern,Gallipoli | Battle of Lone Pine, part of the August Offensive. |
| August 6–13 | Middle Eastern,Gallipoli | Battle of Krithia Vineyard, part of the August Offensive. |
| August 6–15 | Middle Eastern,Gallipoli | Alliesland at Suvla Bay, a phase of the August Offensive. |
| August 6–21 | Middle Eastern,Gallipoli | Battle of Sari Bair, part of the August Offensive. Last and unsuccessful attempt by the British to seize theGallipoli peninsula.[52] |
| August 7 | Middle Eastern,Gallipoli | Battle of the Nek, a phase of the August Offensive. |
| August 7–19 | Middle Eastern,Gallipoli | Battle of Chunuk Bair, a phase of the August Offensive. |
| August 19 | Naval,Atlantic | A German U-boat sinks the linerSS Arabic (1902). 44 died including 3 Americans |
| August 21 | Middle Eastern,Gallipoli | Scimitar Hill, a phase of the August Offensive. |
| Politics | Italy declares war on the Ottoman Empire.[24] | |
| August 21–29 | Middle Eastern,Gallipoli | Battle of Hill 60, part of the August Offensive. |
| August 26 – September 19 | Eastern | Sventiany Offensive, a phase of the Gorlice-Tarnow Offensive. |
| September 1 | Naval,Atlantic | Germany suspends unrestricted submarine warfare. (details) |
| September 5–8 | Politics | TheZimmerwald Conference of anti-militarist European socialist parties is held inZimmerwald,Switzerland. |
| September 5 | Eastern | Nicholas II removesGrand Duke Nicholas Nikolayevich as Commander-in-Chief of the Russian Army, personally taking that position. |
| September 15 – November 4 | Western | Third Battle of Artois. |
| September 19 | Eastern | The Germans occupyVilnius.The Gorlice-Tarnów Offensive ends. |
| September 25–28 | Western | Battle of Loos, a major British offensive, fails. |
| September 25 – October 15 | Western | Battle of the Hohenzollern Redoubt, a phase of the Battle of Loos. |
| September 25 – November 6 | Western | Second Battle of Champagne. |
| September 28 | Middle Eastern,Mesopotamian | Battle of Es Sinn. |
| October 3 | Balkan,Macedonian | Allies land troops atSalonika inGreece to aidSerbia. |
| October 7 – December 4 | Balkan,Serbian | Serbia is invaded byGermany,Austria-Hungary, andBulgaria. |
| October 12 | Politics | Edith Cavell executed. |
| October 14 | Politics | Bulgaria declares war on Serbia[24] (details) |
| October 14 – November 9 | Balkan,Serbian | Morava Offensive, a phase of the Central Powers Invasion of Serbia, Bulgarians break through Serbian lines. |
| October 14 – November 15 | Balkan,Serbian | Ovche Pole Offensive, a phase of the Central Powers invasion of Serbia, Bulgarians break through Serbian lines. |
| October 15 | Politics | TheUnited Kingdom declares war on Bulgaria.[24][53] |
| Politics | Montenegro declares war on Bulgaria.[24] | |
| October 16 | Politics | France declares war on Bulgaria.[24] |
| October 17 – November 21 | Balkan,Macedonian | Battle of Krivolak, first of theSalonika front. |
| October 18 – November 4 | Italian | Third Battle of the Isonzo |
| October 19 | Politics | Italy andRussia declare war on Bulgaria.[24] |
| October 27 | Politics | Andrew Fisher resigns asPrime Minister of Australia; he is replaced byBilly Hughes. |
| October 29 | Politics | René Viviani resigns asPrime Minister of France; he is replaced byAristide Briand. |
| November 4–6 | African,Kamerun | Battle of Banjo. |
| November 10 | Middle Eastern,Persian | Pro-Central Powers Iranians seizeShiraz from pro-Entente forces and arrest all British citizens in the city. |
| November 10 – December 2 | Italian | Fourth Battle of the Isonzo |
| November 10 – December 4 | Balkan,Serbian | Kosovo Offensive, a phase of the Central Powers invasion of Serbia, Serbians pushed into Albania. |
| November 14–30 | Middle Eastern,Persian | Russian forces from the Caucasus occupyTehran. |
| November 17 | African,North African | Armed by Ottomans and Germans, theLibyanSenussi cross the border and attackEgypt from the west. (details) |
| November 22–25 | Middle Eastern,Mesopotamian | Battle of Ctesiphon, in present-dayIraq.[54] |
| November 27 | Balkan,Serbian | The Serbian army collapses. It will retreat to theAdriatic Sea and be evacuated by the Italian and French Navies. (details) |
| December – July, 1916 | Naval,African,East African | Battle of Lake Tanganyika. |
| December 6–12 | Balkan,Macedonian | Battle of Kosturino |
| December 7 | Middle Eastern,Mesopotamian | The FirstSiege of Kut, Mesopotamia, by the Ottomans begins.[55] |
| December 15 | Middle Eastern,Persian | Russians occupyHamadan. |
| December 18 | Middle Eastern,Gallipoli | Gallipoli evacuations, a major Ottoman victory and a "disaster for the Allies." |
| December 19 | Western | Douglas Haig replacesJohn French as commander of theBritish Expeditionary Force. |
| December 23 | African,Kamerun | Carl Zimmermann orders the retreat of all German forces and civilians in Kamerun to the Spanish colony ofRío Muni. |
| Dates | Theater/Front/Campaign | Events |
|---|---|---|
| January 5–17 | Balkan | Austro-Hungarian offensive againstMontenegro, which capitulates. (details) |
| January 6–7 | Balkan | Battle of Mojkovac |
| January 6–8 | Middle Eastern | Battle of Sheikh Sa'ad, a phase of the first siege of Kut |
| January 9 | Gallipoli | The Gallipoli Campaign ends in an Allied defeat and an Ottoman victory.[56] (details) |
| January 10 – February 16 | Caucasian | Battle of Erzurum |
| January 11 | Balkan | Corfu occupied by the Allies. (details) |
| January 13 | Middle Eastern | Battle of Wadi, a phase of the first siege of Kut. (details) |
| January 21 | Middle Eastern | Battle of Hanna, a phase of the first siege of Kut |
| January 24 | Naval | Reinhard Scheer is appointed commander of Germany'sHochseeflotte.[57] (details) |
| January 27 | Politics | Conscription introduced in the United Kingdom by theMilitary Service Act 1916.[58] (details) |
| February 5 – April 15 | Caucasian | Trebizond Campaign. |
| February 12 | African | Battle of Salaita Hill. |
| February 21 | Western | TheBattle of Verdun begins.[59] |
| February 26 | African | Battle of Agagia:Senussi rebellion suppressed by the British. |
| February 28 | African | GermanKamerun (Cameroon) surrenders. (details) |
| March 1 | Naval | Germany resumes unrestricted submarine warfare. (details) |
| March 1–15 | Italian | Fifth Battle of the Isonzo. |
| March 2 – August 4 | Caucasian | Battle of Bitlis. |
| March 8 | Middle Eastern | Battle of Dujaila: a British attempt to relieve Kut failed. (details) |
| March 9 | Politics | Germany declares war onPortugal.[24] Portugal officially enters the war. (details) |
| March 11–12 | African | Battle of Latema Nek. |
| March 14 | Politics | TheManifesto of the Sixteen, declaringKropotkinist-anarchist support of the Allied war effort, is published. (details) |
| March 15 | Politics | Austria-Hungary declares war on Portugal.[24] |
| March 16 – November 6 | African | British preemptively invade theSultanate of Darfur and annex it to theAnglo-Egyptian Sudan. (details) |
| March 18 | African | Battle of Kahe. |
| March 18 – April | Eastern | Lake Naroch Offensive. |
| April 24–29 | Politics | Easter Rising byIrish rebels for independence from theUnited Kingdom. (details) |
| April 24–30 | Politics | TheKienthal Conference, the second meeting of the anti-war socialistZimmerwald Movement, is held inKienthal,Switzerland. (details) |
| April 27–29 | Western | Gas attacks at Hulluch. |
| April 29 | Middle Eastern | The British forces under siege at Kut surrender to the Ottomans, first siege of Kut ends. (details) |
| May 7–10 | African | Battle of Kondoa Irangi. |
| May 10 | Naval | Germany suspends unrestricted submarine warfare. (details) |
| May 15 – June 10 | Italian | Austro-HungarianStrafexpedition in Trentino. (details) |
| May 16 | Politics | Signing of theSykes-Picot Agreement between Britain and France defining their proposed spheres in the Middle East. (details) |
| May 18 | Middle Eastern | Russian forces in Persia link up with the British inMesopotamia, but it is too late. (details) |
| May 31 – June 1 | Naval | Battle of Jutland between Britain'sGrand Fleet and Germany'sHochseeflotte. (details) |
| June 2–14 | Western | Battle of Mont Sorrel. |
| June 3 | Middle Eastern | Russians fail to encircle Ottoman forces in Persia. (details) |
| June 4 | Eastern | TheBrusilov Offensive begins. |
| June 5 | Middle Eastern | The Arab Revolt inHejaz begins. (details) |
| Naval | HMS Hampshire is sunk off theOrkney Islands;Lord Kitchener dies. (details) | |
| June 8 | Naval | In theAdriatic Sea the Italian troopshipSS Principe Umberto is sunk by an Austro-Hungarian submarine. It is the deadliest sinking of the war, with 1,900 lives lost. |
| June 10 | Politics | Italy:Paolo Boselli succeedsAntonio Salandra asPrime Minister. (details) |
| Middle Eastern | TheSiege of Medina begins. | |
| June 10 – July 4 | Middle Eastern | Battle of Mecca, Arabs capture the city. (details) |
| June 12 | Middle Eastern | Percy Sykes marches onKerman to link up with the Russian forces in central-northern Persia. |
| June 30 | Western | Battle of the Boar's Head, diversion from the Battle of the Somme which began the next day. |
| July | Middle Eastern | Battle of Taif. (details) |
| July 1 | Western | TheBattle of the Somme begins. (details) |
| July 1–3 | Politics | TheSocial Democratic Party wins a majority in the parliament of the Russian-ruledGrand Duchy of Finland. (details) |
| July 1–13 | Western | Second Battle of Albert (Opening phase of the Battle of the Somme). (details) |
| July 1–2 | Western | British capture Fricourt during the Second Battle of Albert. (details) |
| July 2 | Middle Eastern | Ottoman counter-attack into Persia reachesKermanshah. (details) |
| July 2–25 | Caucasian | Battle of Erzincan. |
| July 3–7 | Western | British capture La Boisselle during the Second Battle of Albert. (details) |
| July 3–12 | Western | British capture Mametz Wood during the Second Battle of Albert. (details) |
| July 3–17 | Western | British capture Ovillers during the Second Battle of Albert and Battle of Bazentin Ridge. (details) |
| July 4–6 | Eastern | Battle of Kostiuchnowka. |
| July 7–11 | Western | British capture Contalmaison during the Second Battle of Albert. (details) |
| July 8–14 | Western | British capture Trônes Wood during the Second Battle of Albert. (details) |
| July 14–17 | Western | Battle of Bazentin Ridge (Initial phase of the Battle of the Somme) (details) |
| July 14 – September 15 | Western | Battles for Longueval andDelville Wood (Initial phase of the Battle of the Somme) (details) |
| July 19–20 | Western | Battle of Fromelles (Initial phase of the Battle of the Somme). |
| July 23 – August 7 | Western | Battle of Pozières (Initial phase of the Battle of the Somme) (details) |
| July 24 – August 8 | Eastern | Battle of Kowel. |
| July 30 | German agents sabotage munition factories inJersey City that supply the Allies, causing theBlack Tom explosion. | |
| August 3–5 | Middle Eastern | Battle of Romani. Ottoman attack on the British in theSinai peninsula fails. (details) |
| August 6–17 | Italian | Sixth Battle of the Isonzo. The Italians captureGorizia (August 9). (details) |
| August 6 | Italian | Battle of Doberdo, part of the Sixth Battle of Isonzo. |
| August 9–18 | Balkan | First battle of Doiran. (details) |
| August 10 | Middle Eastern | Ottomans take Hamadan. (details) |
| August 24 | African | Battle of Mlali. |
| August 27 | Balkan | Romania enters the war on the Entente's side. Her army is defeated in a few weeks. |
| August 27 – December | Balkan | Conquest of Romania by Central Powers. (details) |
| August 27 – November 26 | Balkan | Battle of Transylvania, a phase of the conquest of Romania. |
| August 28 | Politics | Italy declares war onGermany.[24] |
| August 29 | Politics | Paul von Hindenburg replacesErich von Falkenhayn as German Chief of Staff. (details) |
| August 30 | Politics | The Ottoman Empire declares war on Romania.[24] |
| September 1 | Politics | Bulgaria declares war on Romania.[24] |
| September 2–6 | Balkan | Battle of Turtucaia, a phase of the conquest of Romania. |
| September 3–6 | Western | Battle of Guillemont (intermediate phase of the Battle of the Somme) (details) |
| September 5–7 | Balkan | Battle of Dobrich, a phase of the conquest of Romania. |
| September 6 | Politics | TheCentral Powers create a unified command. |
| September 7–11 | African | Battle of Kisaki. |
| September 8–19 | African | Battle of Tabora. |
| September 9 | Western | Battle of Ginchy (intermediate phase of the Battle of the Somme) (details) |
| September 9–11 | African | Battle of Dutumi. |
| September 12 – December 11 | Balkan | Monastir Offensive, set up of theSalonika front. |
| September 12–14 | Balkan | Battle of Malka Nidzhe, a phase of theMonastir Offensive. |
| September 12–30 | Balkan | Battle of Kaymakchalan, a phase of the Monastir Offensive. |
| September 14–17 | Italian | Seventh Battle of the Isonzo |
| September 15–22 | Western | Battle of Flers-Courcelette; the British usearmoured tanks for the first time in history. (details) |
| September 17–19 | Balkan | First Battle of Cobadin, a phase of the conquest of Romania. |
| September 20 | Eastern | TheBrusilov Offensive ends with a substantial Russian success. (details) |
| September 25–28 | Western | Battle of Morval (part of the final stages of the Battle of the Somme) (details) |
| September 26–28 | Western | Battle of Thiepval Ridge (part of the final stages of the Battle of the Somme) (details) |
| September 29 – October 5 | Balkan | Flamanda Offensive, a phase of the conquest of Romania. |
| October–November | Balkan | First Battle of the Cerna Bend, a phase of the Monastir Offensive. (details) |
| October 1 – November 5 | Western | Battle of Le Transloy (last stage of the Battle of the Somme) (details) |
| October 1 – November 11 | Western | Battle of Ancre Heights (last stage of the Battle of the Somme). |
| October 9–12 | Italian | Eighth Battle of the Isonzo. |
| October 14 – January 6, 1917 | African | Battle of Kibata. |
| October 19–25 | Balkan | Second Battle of Cobadin, a phase of the conquest of Romania. |
| October 24 | Western | The French recaptureFort Douaumont nearVerdun. (details) |
| November 1–4 | Italian | Ninth Battle of the Isonzo. |
| November 11 | African | Battle of Matamondo. |
| November 13–18 | Western | Battle of the Ancre (closing phase of the Battle of the Somme) (details) |
| November 18 | Western | TheBattle of the Somme ends with enormous casualties and an Anglo-French advantage. (details) |
| November 21 | Naval | HMHS Britannic sinks after hitting a German mine, becoming the largest ship lost during WW1. (details) |
| Politics | Francis Joseph I, Emperor of Austria and King of Hungary, dies and is succeeded by Charles I. (details) | |
| November 25 | Naval | David Beatty replacesJohn Jellicoe as commander of theGrand Fleet. Jellicoe becomes First Lord of the Sea. (details) |
| November 25 – December 3 | Balkan | Battle of Bucharest, a phase of the conquest of Romania. |
| November 28 | Balkan | Prunaru Charge, a phase of the Battle of Bucharest, Romanian cavalry desperately charge into enemy lines. |
| December 1 | Balkan | Battle of the Arges, a phase of the Battle of Bucharest. |
| December 1 – January 18, 1917 | Middle Eastern | Allies capture Yanbu. (details) |
| December 3–6 | Politics | In a four-day crisis December 3–6, 1916,H. H. Asquith is unaware how fast he is losing support.David Lloyd George now has growing Unionist support, the backing of Labour and (thanks toChristopher Addison) a majority of Liberal MPs. Asquith falls. (details) |
| December 7–31 | Politics | The new Prime Minister Lloyd George answers the loud demands for a much more decisive government. He energetically sets up a new small war cabinet, a cabinet secretariat underMaurice Hankey, a secretariat of private advisors in the 'Garden Suburb' and moved towards prime ministerial control.[60] (details) |
| December 6 | Balkan | The Germans occupyBucharest. The capital ofRomania moved toIaşi. (details) |
| December 13 | Western | Robert Nivelle replacesJoseph Joffre as Commander-in-Chief of the French Army. (details) |
| December 17 | African | Kaocen Revolt: TheTuareg besiege the French garrison atAgadez. |
| December 18 | Western | Battle of Verdun ends with enormous casualties on both sides. |
| December 23 | Middle Eastern | Battle of Magdhaba in the Sinai peninsula.[61] (details) |
| December 23–29 | Eastern | Christmas Battles. |
| December 27 | African | Togoland is divided into British and French administrative zones. (details) |
| December 30 | Politics | Grigori Rasputin, Russia'séminence grise, is assassinated. (details) |
| Dates | Theater/Front/Campaign | Events |
|---|---|---|
| January 3–4 | African | Battle of Behobeho. |
| January 9 | Middle Eastern | Battle of Rafa. The British drive the Ottomans out of Sinai. (details) |
| January 11 – March 13 | Western | British raid the Ancre. (details) |
| January 16 | Politics | The German Foreign SecretaryArthur Zimmermann sends a telegram to his ambassador in Mexico, instructing him to propose an alliance against the United States to the Mexican government. (details) |
| February 1 | Naval | Germany resumes unrestricted submarine warfare. (details) |
| February 3 | Naval | SS Housatonic an American steamer carrying wheat fromGalveston, Texas toEngland is sunk by a U-boat. |
| February 13 | Politics | Mata Hari is arrested inParis on charges of spying for the Germans. |
| February 21 | Western | Sinking of the SS Mendi-the SS Mendi was a troop ship carrying members of the South African Native Corps (SANLC).The SANLC was a group of black South Africans recruited as non-combatants. The ship was on its way to France where the SANLC members were going to the trenches on the Western Front. The Mendi stopped in England and was heading across the English Channel when it sank |
| February 23 | Middle Eastern | Second Battle of Kut. The British recapture the city. (details) |
| February 23 – April 5 | Western | The Germans withdraw to theHindenburg Line. |
| March 1 | Politics | Arz von Straussenberg replacesConrad von Hötzendorf as Austro-Hungarian Chief of Staff. (details) |
| March 3 | African | The French relieve Agadez. |
| March 8–11 | Middle Eastern | The British captureBaghdad. (details) |
| March 8 | Politics | The celebrations ofInternational Women's Day in Petrograd spawn severe protests that will evolve into theFebruary Revolution. |
| March 12 | Politics | Russian troops refuse to fire on demonstrators after 50 are killed in Petrograd'sZnamenskaya Square the day before. Numerous attacks against prisons, courts, police stations andOkhrana offices. Provisional Committee of the Duma formed. Petrograd Soviet formed. |
| March 13 | African | Battle of Nambanje. |
| March 13 – April 23 | Middle Eastern | Samarra offensive, British capture much of Mesopotamia. |
| March 14 | Politics | China severs relations with Germany.[24] |
| March 15 | Politics | Nicholas II abdicates. Aprovisional government is formed. |
| March 16 | Politics | Lenin arrives in Petrograd from his exile inSwitzerland and publishes hisApril Thesis. |
| March 17 | Politics | Aristide Briand resigns asPrime Minister of France; he is replaced byAlexandre Ribot. |
| March 26 | Middle Eastern | First Battle of Gaza. The British attempt to capture the city fails.[62] (details) |
| April–October | Middle Eastern | Stalemate in Southern Palestine. |
| April 2–3 | Western | Australians attackNoreuil. (Details.) |
| April 6 | Politics | The United States declares war on Germany.[63] (details) |
| April 7 | Politics | Cuba declares war on Germany.[24] |
| Politics | Panama declares war on Germany.[24] | |
| Asian and Pacific | Scuttling of SMS Cormoran inGuam, the only hostile action between American and German forces in the Pacific. | |
| April 9 – May 17 | Western | Second Battle of Arras. The British attack a heavily fortified German line without obtaining any strategic breakthrough.[64] (details) |
| April 9–12 | Western | The Canadians obtain a significant victory in the Battle of Vimy Ridge, part of the first phase of the Second Battle of Arras.[65] (details) |
| April 9–14 | Western | First Battle of the Scarpe, part of the first phase of the Second Battle of Arras. (details) |
| April 10–11 | Western | First Battle of Bullecourt, part of the first phase of the Second Battle of Arras. (details) |
| April 11 | Politics | Brazil severs relations with Germany.[24] |
| April 13 | Politics | Bolivia severs relations with Germany.[24] |
| April 15 | Western | Battle of Lagnicourt, part of the Second phase of the Second Battle of Arras. (details) |
| April 16 – May 9 | Western | The Second Battle of the Aisne (also known as Nivelle Offensive) ends in disaster for both the French army and its commanderRobert Nivelle.[66] (details) |
| April 17–20 | Western | Battle of the Hills (also known as Third battle of Champagne), a diversion to the Second Battle of the Aisne. |
| April 19 | Middle Eastern | Second Battle of Gaza. The Ottoman lines resist a British attack. (details) |
| April 22 – May 8 | Balkan | Second Battle of Doiran. (details) |
| April 23 | Politics | The Ottoman Empire severs relations with the United States.[24] |
| April 23–24 | Western | Second Battle of Scarpe, part of the second phase of the Second Battle of Arras. (details) |
| April 28–29 | Western | Battle of Arleux, part of the Second phase of the Second Battle of Arras. (details) |
| April 29 – May 20 | Western | Series of mutinies in the French army.[67] (details) |
| May 3–4 | Western | Third battle of the Scarpe, part of the second phase of the Second Battle of Arras. (details) |
| Politics | Mass demonstrations in Petrograd andMoscow to protestPavel Milyukov'snote affirming Russia's commitment to theEntente war effort. (details) | |
| May 3–17 | Western | Second Battle of Bullecourt, part of the second phase of the Second Battle of Arras. (details) |
| May 5 | Politics | Australian Prime MinisterBilly Hughes wins an enlarged majority in federal elections with the pro-conscriptionNationalist Party. (details) |
| May 5–15 | Balkan | Allied Spring offensive on the Salonika front. |
| May 5–9 | Balkan | Second Battle of the Cerna Bend, a phase of the Allied Spring Offensive. (details) |
| May 12 – June 6 | Italian | Tenth Battle of the Isonzo. (details) |
| May 15 | Western | Philippe Pétain replacesRobert Nivelle as Commander-in-Chief of the French Army.[68] (details) |
| May 23 | Italian | Battle of MountHermada in the Karst. |
| Politics | Salonika Trial ends:Dragutin Dimitrijevic, chief conspirator of the Sarajevo Assassination, is sentenced to death by Serbia on trumped up charges, as part of negotiations for a peace treaty with Austria-Hungary. | |
| June–October | Western | Operation Hush, Abortive British plan to capture coast of Belgium. |
| June 7–14 | Western | Second Battle of Messines, the British blow 19 deepmines and recapture Messines Ridge. (details) |
| June 10–29 | Italian | Battle of Mount Ortigara. (details) |
| June 12 | Politics | Constantine I of Greece abdicates.[69] |
| June 13 | Air | First successfulheavy bomber raid onLondon done by theGotha G.IV. |
| June 25 | Western | First American troops land inFrance. (details) |
| June 27 | Western | Batterie Pommern aka. 'Lange Max', world's largest gun fires for the first time fromKoekelare toDunkirk (±50 km). |
| June 30 | Politics | Greece declares war on theCentral powers. (details) |
| July 1–2 | Eastern | Battle of Zborov, a phase of the Kerensky Offensive. (details) |
| July 1–12 | Politics | Brief monarchist coup and restoration in China, allegedly promoted by Germany to distance China from the Entente. (details) |
| July 1–19 | Eastern | The Kerensky Offensive fails. It is the last Russian initiative in the war.[70] (details) |
| July 6 | Middle Eastern | Arab rebels led byLawrence of Arabia seize the Jordanian port ofAqaba.[71] (details) |
| July 11 | Western | The Open Letter to Albert I is published byFlemish Movement sympathisers within theBelgian Army on theYser Front, complaining about official discrimination againstDutch language (details) |
| July 16–17 | Politics | PetrogradJuly Days. |
| July 19 | Politics | TheReichstag passes a Peace Resolution. |
| July 20 | Politics | Corfu Declaration about the futureKingdom of Yugoslavia.[72] (details) |
| July 21 | Politics | Alexander Kerensky replacesGeorgy Lvov as Minister-President of theRussian Provisional Government. |
| July 22 | Politics | Siam declares war on Germany and Austria-Hungary.[24] |
| July 22 – August 1 | Balkan | Battle of Mărăști |
| July 29 | African | Battle of Kiawe Bridge. |
| July 31 | Western | The Third Battle of Ypres (also known as Battle of Passchendaele) begins. (details) |
| July 31 – August 2 | Western | Battle of Pilckem Ridge (Opening phase of the Third Battle of Ypres). |
| August 2 | Asian and Pacific | The German raiderSMSSeeadler is wrecked atMopelia inFrench Polynesia. |
| August 2–10 | African | Battle of Rumbo. |
| August 4 | Politics | Liberia declares war on Germany. |
| August 6–20 | Balkan | Battle of Mărăşeşti. (details) |
| August 8–22 | Balkan | Third Battle of Oituz. |
| August 14 | Politics | China declares war on Germany and Austria-Hungary.[73][24] |
| August 15–25 | Western | Battle of Hill 70 (Continuation of British operations near Lens). |
| August 16–18 | Western | Second Battle of Langemarck (Initial phase of the Third Battle of Ypres). (details) |
| August 17 | Asian and Pacific | China terminates the German and Austro-Hungarianconcessions in Tianjin and occupies them. |
| August 18–28 | Italian | Eleventh Battle of the Isonzo. (details) |
| August 20–26 | Western | Second Offensive Battle of Verdun. |
| September – October | Eastern | Operation Albion. German capture ofOesel,Dago andMoon Islands. |
| September 1–3 | Eastern | Battle of Jugla. |
| September 5 | Asian and Pacific | The SMSSeeadler's crew sail toFiji in a lifeboat and capture the FrenchschoonerLutece, allowing their escape. They rename itFortuna. |
| September 5–12 | Politics | TheThird Zimmerwald Conference of the anti-war socialistZimmerwald Movement, is held inStockholm. (details) |
| September 8–12 | Politics | Russia: General Kornilov's coup attempt fails. (details) |
| September 12 | Politics | Alexandre Ribot resigns asPrime Minister of France; he is replaced byPaul Painlevé. |
| September 14 | Politics | Russia declared a republic. |
| September 20–26 | Western | Battle of the Menin Road Ridge (Second phase of the Third Battle of Ypres). |
| September 21 | Politics | Costa Rica severs relations with Germany.[24] |
| September 26–27 | Western | Battle of Polygon Wood (Second phase of the Third Battle of Ypres). |
| September 28–29 | Middle Eastern | Battle of Ramadi, Mesopotamia. (details) |
| October 4 | Western | Battle of Broodseinde (Second phase of the Third Battle of Ypres). |
| October 5 | Asian and Pacific | TheFortuna wrecks atEaster Island and its crew is interned by the Chileans. |
| October 6 | Politics | Peru severs relations with Germany.[24] |
| October 7 | Politics | Uruguay severs relations with Germany.[24] |
| October 9 | Western | Battle of Poelcappelle (Last phase of the Third Battle of Ypres). |
| October 12 | Western | First Battle of Passchendaele (Last phase of the Third Battle of Ypres). |
| October 15 | Politics | Mata Hari executed. |
| October 15–18 | African | Battle of Mahiwa. |
| October 23 | Middle Eastern | Battle of Wadi Musa. |
| October 23 – November 10 | Western | Battle of La Malmaison, much-postponed French attack on theChemin des Dames. (details) |
| October 24 – November 4 | Italian | Battle of Caporetto. The Austro-Hungarians and Germans break through the Italian lines. The Italian army is defeated and falls back on the Piave River. (details) |
| October 26 | Politics | Brazil declares war on Germany.[24] |
| October 26 – November 10 | Western | Second Battle of Passchendaele (Last phase of the Third Battle of Ypres). |
| October 27 | Middle Eastern | Battle of Buqqar Ridge. |
| October 30 | Politics | Italy: Vittorio Emanuele Orlando succeedsPaolo Boselli as Prime Minister. (details) |
| October 31 – November 7 | Middle Eastern | Third Battle of Gaza. The British break through the Ottoman lines. (details) |
| October 31 | Middle Eastern | Battle of Beersheba (opening phase of the Third Battle of Gaza). (details) |
| November 1–6 | Middle Eastern | Battle of Tel el Khuweilfe. |
| November 2 | Politics | Balfour Declaration: the British government supports plans for a Jewish "national home" in Palestine. (details) |
| November 5 | Politics | The Allies agree to establish a Supreme War Council atVersailles. |
| November 7 | Politics | October Revolution: Kerensky flees Petrograd just before the Petrograd Soviet seizes theWinter Palace. |
| Middle Eastern | Charge at Sheria. | |
| November 8 | Italian | Armando Diaz replacesLuigi Cadorna as Commander-in-Chief of the Italian Army. (details) |
| Middle Eastern | Charge at Huj. | |
| November 9 – December 28 | Italian | First Battle of the Piave: the Austro-Hungarians and Germans try unsuccessfully to cross the river. (details) |
| November 10 | Western | The Third Battle of Ypres (also known as Battle of Passchendaele) ends. (details) |
| November 11 – December 23 | Italian | First Battle of Monte Grappa, Austro-Hungarian offensive halted. |
| November 13 | Politics | France:Paul Painlevé is replaced byGeorges Clemenceau as Prime Minister. (details) |
| Middle Eastern | Battle of Mughar Ridge. | |
| November 14 | Middle Eastern | Battle of Ayun Kara. |
| November 17 | Naval | Second Battle of Heligoland Bight, North Sea. (details) |
| November 17 – December 30 | Middle Eastern | Battle of Jerusalem. The British enter the city (December 11). (details) |
| November 18–24 | Middle Eastern | Battle of Nebi Samwil, a phase of the Battle of Jerusalem. |
| November 19 | Italian | Battle of Caporetto ends.Central Powers take a quarter of a million prisoners. (details) |
| November 20 – December 3 | Western | First Battle of Cambrai. A British attack and the biggest German attack against the British since 1915 succeed and the battle is a stalemate.[74] (details) |
| November 25 | African | Battle of Ngomano, the Germans invade Portuguese East Africa to gain supplies. |
| December 1 | Middle Eastern | Battle of El Burj, a phase of the Battle of Jerusalem. |
| December 6 | Naval | Halifax Explosion: An accidental collision between theNorwegian supply shipSS Imo and the Frenchcargo shipSS Mont-Blanc, laden withhigh explosives for the Western Front, leaves 2,000 dead and 9,000 injured inRichmond, Nova Scotia. It is thelargest man-made explosion before the invention ofatomic weapons. |
| December 6 | Politics | Finland declares independence fromRussia. |
| December 7 | Politics | The United States declares war on Austria-Hungary.[24] |
| December 8 | Politics | Ecuador severs relations with Germany.[24] |
| December 9 | Politics | Romania signs an armistice with theCentral Powers. |
| December 10 | Politics | Panama declares war on Austria-Hungary.[24] |
| December 11 | Middle Eastern | General Allenby leads British and Indian troops intoJerusalem, ending 400 years of Ottoman rule. |
| December 15 | Politics | Armistice between Russia and the Central Powers, to take effect on December 17. |
| December 16 | Politics | Armistice of Erzincan between the Ottomans and the RussianSpecial Transcaucasian Committee. |
| December 17 | Politics | Canadian Prime MinisterRobert Borden wins an enlarged majority in federal elections with the pro-conscriptionUnionist Party. (details) |
| December 20–21 | Middle Eastern | Battle of Jaffa, a phase of the Battle of Jerusalem. (details) |
| Dates | Theater/Front/Campaign | Events |
|---|---|---|
| January 8 | Politics | Woodrow Wilson outlines his Fourteen Points. (details) |
| February to September | Middle Eastern | Allied forces occupy theJordan Rift Valley. (details) |
| February 9 | Politics | TheCentral Powers sign an exclusive protectorate treaty with theUkrainian People's Republic as part of the negotiations inBrest-Litovsk. (details) |
| February 15–16 | Eastern | Battle of Rarancza. |
| February 18 – March 3 | Eastern | Operation Faustschlag, last offensive on Eastern Front. |
| February 19 | Middle Eastern | British begin their assault on Jericho. (details) |
| February 21 | Middle Eastern | The British captureJericho. (details) |
| Eastern | Germans capture Minsk. (details) | |
| February 24 | Eastern | Germans capture Zhytomyr. (details) |
| February 25 | Eastern | German troops captureTallinn. (details) |
| February 28 | Eastern | Germans capture Pskov and Narva. (details) |
| March 2 | Eastern | Germans capture Kiev. (details) |
| March 3 | Politics | At Brest-Litovsk,Leon Trotsky signs the peace treaty with Germany.[75] (details) |
| March 4 | First known case of what will later be calledSpanish flu: Private Albert Gitchell at Camp Funston,Fort Riley,Kansas. | |
| March 7 | Western | German artillery bombard the Americans atRouge Bouquet. (details) |
| March 8–12 | Middle Eastern | Battle of Tell 'Asur. |
| March 8–13 | Eastern | Battle of Bakhmach. |
| March 11 | Over 100 sick from Spanish flu in Fort Riley; first known case outside inQueens,New York. | |
| March 21 – April 5 | Western | First phase of theGerman spring offensive, Operation Michael (also known as Second Battle of the Somme). The Germans obtain a Pyrrhic victory. (details) |
| March 21–23 | Western | The Battle of St. Quentin, first phase of Operation Michael and the Spring Offensive. (details) |
| March 21 – April 2 | Middle Eastern | First Transjordan attack on Amman. |
| March 23 – August 7 | Western | Artillery bombardment ofParis. (details) |
| March 24–25 | Western | First Battle of Bapaume, a phase of Operation Michael. (details) |
| March 25 | Western | First Battle of Noyon, a phase of Operation Michael. (details) |
| March 25 | Politics | Penza Agreement: TheCzechoslovak Legion is given free passage toVladivostok to join the Entente in return for surrendering most weapons to the Bolsheviks. |
| March 26 | Politics | French MarshalFerdinand Foch is appointed Supreme Commander of all Allied forces. (details) |
| March 26–27 | Western | Battle of Rosieres, a phase of Operation Michael. (details) |
| Middle Eastern | Action of Khan Baghdadi. | |
| March 27–31 | Middle Eastern | First Battle of Amman, a phase Of The First Transjordan Attack. |
| March 28 | Western | Third Battle of Arras (also known as First Battle of Arras (1918)), a phase of Operation Michael. (details) |
| March 30 – April 5 | Western | First Battle of Villers-Bretonneux, a phase of Operation Michael. |
| March 30 | Western | Battle of Moreuil Wood. |
| April 1 | Air | Royal Air Force founded by combining theRoyal Flying Corps and theRoyal Naval Air Service. |
| April 4–5 | Western | Battle of the Avre, final phase of Operation Michael. |
| April 7–29 | Western | Second phase of the Spring Offensive, Operation Georgette (also known as Battle of the Lys). The results are disappointing for the Germans. (details) |
| April 7–9 | Western | Battle of Estaires, first phase of Operation Georgette. (details) |
| April 10–11 | Western | Third Battle of Messines, a phase of Operation Georgette. (details) |
| April 12–13 | Western | Battle of Hazebrouck, a phase of Operation Georgette. (details) |
| April 13–15 | Western | Battle of Bailleul, a phase of Operation Georgette. (details) |
| April 14 | Politics | Ottokar Czernin resigns as Austria-Hungary's Foreign Minister over theSixtus Affair. |
| April 17–19 | Western | First Battle of Kemmelberg, a phase of Operation Georgette. (details) |
| April 18 | Western | Battle of Bethune, a phase of Operation Georgette. (details) |
| April 21 | Air | The Red Baron is shot down overVaux-sur-Somme. |
| April 23 | Politics | Guatemala declares war on Germany.[24] |
| April 24–27 | Western | Second Battle of Villers-Bretonneux, a phase of Operation Georgette. |
| April 25–26 | Western | Second Battle of Kemmelberg, a phase of Operation Georgette. (details) |
| April 28 | Politics | Gavrilo Princip dies inTerezín prison, fromtuberculosis. |
| April 29 | Western | Battle of Scherpenberg, final phase of Operation Georgette. (details) |
| April 30 – May 4 | Middle Eastern | Second Transjordan attack on Shunet Nimrin and Es Salt. |
| May 7 | Politics | Treaty of Bucharest betweenRomania and the Central Powers. It will never be ratified. (details) |
| May 8 | Politics | Nicaragua declares war on Germany and Austria-Hungary.[24] |
| May 10–11 | Eastern | Battle of Kaniow. |
| May 14 | Politics | Clash atChelyabinsk station between Hungarian POWs heading west to be repatriated and Czechoslovaks going east. Trotsky orders the arrest of the Czechoslovak Legion, but they revolt and seize several towns along theTrans-Siberian Railway. (details) |
| May 21 | Caucasian | Ottomans invadeArmenia. (details) |
| May 21–29 | Caucasian | Battle of Sardarabad, a phase of the invasion of Armenia. |
| Caucasian | Battle of Abaran, a phase of the invasion of Armenia. | |
| May 23 | Politics | Costa Rica declares war on Germany.[24] |
| May 24–28 | Caucasian | Battle of Karakilisa, a phase of the invasion of Armenia. |
| May 27 – June 6 | Western | Third Battle of the Aisne (also known as Operation Blücher-Yorck, third phase of the Spring Offensive). After initial gains, the German advance is halted. (details) |
| May 28 | Western | Battle of Cantigny. |
| May 29–31 | Balkan | Battle of Skra-di-Legen |
| June 1–26 | Western | Battle of Belleau Wood, part of theGerman spring offensive. |
| June 8 | Middle Eastern | Action of Arsuf. |
| Caucasian | Ottomans re-enter Tabriz. (details) | |
| June 8 | Politics | The Czechoslovak Legion forms theCommittee of Members of the Constituent Assembly inSamara.Stanislav Čeček calls to join forces withanti-Bolshevik Russians to overthrow the Communist government and reignite the Eastern Front. (details) |
| June 8 – October | Caucasian | Germany interferes in the Caucasus. (details) |
| June 9–12 | Western | Fourth phase of the Spring Offensive, Operation Gneisenau (also known as Battle of Matz). Despite substantial territorial gains, the Germans do not achieve their strategic goals (details) |
| June 13 | Politics | Provisional Siberian Government formed inOmsk. |
| June 15–23 | Italian | Second Battle of the Piave: the Austro-Hungarian offensive is repelled. (details) |
| June 15–31 | Caucasian | Ottomans occupy Dilman,Khoy and Urmia. (Details.) |
| June 23 | Eastern | British and French troops land atMurmansk in NorthernRussia. It's the beginning of Allied Intervention in theRussian Civil War on theWhite Army's side. (Details.) |
| July 4 | Western | Battle of Hamel. |
| July 12 | Politics | Haiti declares war on Germany.[24] |
| July 14 | Middle Eastern | Battle of Abu Tellul. |
| July 15 – August 6 | Western | Second Battle of the Marne and last German offensive on the Western Front, which fails when the Germans are counterattacked by the French. (details) |
| July 15–17 | Western | Champagne-Marne Offensive (consisting of theFourth Battle of Champagne and theBattle of the Mountain of Reims), a phase of the Second Battle of the Marne. last phase of the Spring Offensive and last German offensive of World War I. (details) |
| July 17 | Politics | Nicholas II and his family are executed by the Bolsheviks, out of fear that they might be released by Czechoslovak andWhite troops. (details) |
| July 18 | Western | Battle of Chateau-Thierry, a phase of the Second Battle of the Marne. (details) |
| Western | End of the Second Battle of Artois | |
| July 18–22 | Western | Battle of Soissons, a phase of the Second Battle of the Marne. (details) |
| July 19 | Western | Battle of Tardenois, a phase of the Second Battle of the Marne. |
| Politics | Honduras declares war on Germany.[24] | |
| August | Spanish fluvirus mutates: Simultaneous deadlier outbreaks inBrest,Freetown andBoston. | |
| August 5 | Eastern | The CzechoslovakPeople's Army of Komuch takesKazan from the Bolsheviks and captures the Imperial Russiangold reserve. (details) |
| August 8 – November 11 | Western | Hundred Days Offensive, last offensive onWestern Front. |
| August 8–12 | Western | Battle of Amiens, first phase of the Hundred Days Offensive. (details) |
| August 9–12 | Western | Battle of Montdidier. |
| August 13 – September 3 | Italian | Battle of San Matteo. |
| August 17–29 | Western | Second Battle of Noyon, a phase of the Hundred Days Offensive. (details) |
| August 21–22 | Western | Third Battle of Albert, opening phase of the Second Battle of the Somme. (details) |
| August 21 – September 3 | Western | Second Battle of the Somme (also known as Third battle of the Somme), a phase of theHundred Days Offensive. (details) |
| August 21 – September 3 | Western | Second Battle of Bapaume, a phase of the Second Battle of the Somme. |
| August 26 – September 3 | Western | Fourth Battle of Arras (also known as Second Battle of Arras (1918)), a phase of the Second Battle of the Somme (details) |
| August 26–30 | Western | Fourth Battle of the Scarpe (also known as Battle of the Scarpe (1918)), a phase of the Fourth Battle of Arras. (details) |
| August 26 – September 14 | Caucasian | Battle of Baku, last Turkish offensive of the war. |
| August 30–31 | African | Battle of Lioma. |
| August 31 – September 3 | Western | Battle of Mont Saint-Quentin, a phase of the Second Battle of the Somme. |
| September 1–2 | Western | Battle of Peronne, a phase of the Battle of Mont Saint-Quentin. (details) |
| September 2–3 | Western | Battle of Drocourt-Queant Line, final phase of the Second Battle of the Somme. (details) |
| September 8–23 | Politics | Ufa Conference: Formation of theProvisional All-Russian Government with the support of the Czechoslovak Legion. |
| September 10 | Western | Battle of Savy-Dallon, a phase of the Hundred Days Offensive. (details) |
| September 12 | Western | Battle of Havrincourt, a phase of the Hundred Days Offensive. (details) |
| September 12–15 | Western | Battle of Saint-Mihiel, a phase of the Hundred Days Offensive. |
| September 14 | Western | Battle of Vauxaillon, a phase of the Hundred Days Offensive. (details) |
| September 14–29 | Balkan | Vardar Offensive, final offensive on theBalkan Front. |
| September 15 | Balkan | The Allies (French and Serbs) break through the Bulgarian lines at Dobro Polje, a phase of the Vardar Offensive. (details) |
| September 18 | Western | Battle of Epehy, a phase of the Hundred Days Offensive. |
| September 18–19 | Balkan | Third Battle of Doiran, a phase of the Vardar Offensive, The Bulgarians halt the British and Greek advance. (details) |
| September 18 – October 17 | Western | Battle of the Hindenburg Line, a phase of the Hundred Days Offensive. The Allies break through the German lines. (details) |
| September 19–25 | Middle Eastern | Battle of Megiddo. The British conquer Palestine. (details) |
| Middle Eastern | Battle of Nablus, a phase of the Battle of Meggido. (details) | |
| Middle Eastern | Third Transjordan attack, a phase of the Battle of Nablus. | |
| Middle Eastern | Battle of Sharon, a phase of the Battle of Megiddo. | |
| September 19 | Middle Eastern | Battle of Tulkarm, a phase of the Battle of Sharon. |
| Middle Eastern | Battle of Arara, a phase of the Battle of Sharon. | |
| September 19–20 | Middle Eastern | Battle of Tabsor, a phase of the Battle of Sharon. |
| September 20 | Middle Eastern | Capture of Jenin, a phase of the Battle of Sharon. |
| Middle Eastern | British capture both Afulah and Beisan during the Battle of Sharon. (details) | |
| September 20–21 | Middle Eastern | Battle of Nazareth, a phase of the Battle of Sharon. |
| September 22 | Middle Eastern | The British capture Jisr ed Damieh in the Battle of Sharon. (details) |
| September 23 | Middle Eastern | Battle of Haifa, a phase of the Battle of Sharon. (details) |
| September 25 | Middle Eastern | Battle of Samakh, a phase of the Battle of Sharon. |
| Middle Eastern | The British capture Tiberias during the Battle of Sharon. (details) | |
| Middle Eastern | Second Battle of Amman, a phase of the Third Transjordan Attack. | |
| September 26 – November 11 | Western | Meuse-Argonne Offensive, the final phase of the Hundred Days Offensive and of World War I. (details) |
| September 26 – October 1 | Middle Eastern | The British enterDamascus. (details) |
| September 26 | Western | Battle of Somme-Py (Initial phase of the Meuse-Argonne Offensive). (details) |
| Middle Eastern | Charge at Irbid, a phase of the Capture of Damascus. | |
| September 26–27 | Middle Eastern | British capture Deraa during the Capture of Damascus. (details) |
| September 27 | Middle Eastern | Battle of Jisr Benat Yakub, a phase of the Capture of Damascus. |
| September 27 – October 1 | Western | Battle of the Canal du Nord, a phase of the Battle of the Hindenburg Line. |
| September 28 – October 2 | Western | Fifth Battle of Ypres (also known as Advance on Flanders), a phase of the Battle of the Hindenburg Line. |
| September 29 – October 10 | Western | Battle of St. Quentin Canal, a phase of the Hundred Days Offensive. |
| September 30 | Politics | Bulgaria signs anarmistice with the Allies.[76] |
| Western | Battle of Saint-Thierry (Initial phase of the Meuse-Argonne Offensive). (details) | |
| Middle Eastern | Charge at Kaukab, a phase of the Capture of Damascus. | |
| Middle Eastern | Charge at Kiswe, a phase of the Capture of Damascus. | |
| October 3 | Politics | TsarFerdinand I of Bulgaria abdicates andBoris III accedes to the throne. |
| October 3–27 | Middle Eastern | Pursuit to Haritan. |
| Western | Battle of Blanc Mont Ridge. | |
| October 4 | Politics | Germany requests an Armistice to U.S. PresidentWoodrow Wilson. He demands German withdrawal from all occupied territory, and theKaiser's abdication. |
| October 8–10 | Western | Second Battle of Cambrai (also known as Battle of Cambrai (1918)), a phase of the Battle of the Hindenburg Line. (details) |
| October 14 | Politics | General strike of 14 October 1918 inCzechoslovakia. The same day theCzechoslovak declaration of independence is made in Washington. |
| October 14–17 | Western | Battle of Montfaucon (intermediate phase of the Meuse-Argonne Offensive). (details) |
| October 14–19 | Western | Battle of Courtrai, closing phase of the Hundred Days offensive. (details) |
| October 15 | Western | Battle of Mont-D'Origny, a phase of the Hundred Days Offensive. (details) |
| October 17–26 | Western | Battle of the Selle, closing phase of the Hundred Days Offensive. |
| October 20 | Naval | Germany suspends submarine warfare. (details) |
| Western | Battle of Lys and Escaut (Which included theSecond Battle of Lys and theBattle of the Escaut), a phase of the Hundred Days Offensive. (details) | |
| Western | Battle of Serre, a phase of the Hundred Days Offensive. (details) | |
| October 23–30 | Middle Eastern | Battle of Sharqat. |
| October 24 – November 4 | Italian | Battle of Vittorio Veneto. The Austro-Hungarian army is routed. The Italians enterTrent and land atTriest. (details) |
| October 24–28 | Italian | SecondBattle of Monte Grappa, beginning phase of Vittorio Veneto. |
| October 25 | Middle Eastern | Battle of Aleppo. (details) |
| October 29 | Politics | Wilhelm Groener replacesErich Ludendorff as Hindenburg's deputy. (details) |
| Naval | Germany'sHochseeflotte mutinies.[77] (details) | |
| Politics | State of Slovenes, Croats and Serbs proclaimed. (details) | |
| October 30 | Politics | The Ottoman Empire signs the Armistice of Mudros. (details) |
| November | First Spanish flu cases in Spain, where reports on the disease are published freely due to the lack of wartime censorship. | |
| November 1 | Western | Battle of Chesne (Closing phase of the Meuse-Argonne Offensive). (details) |
| November 1–2 | Western | Battle of Valenciennes, closing phase of the Hundred Days Offensive. (details) |
| November 3 | Politics | Austria-Hungary signs the armistice with Italy, effective November 4.[78] |
| November 4 | Western | Battle of the Sambre, closing phase of the Hundred Days Offensive. (details) |
| Western | Second Battle of Guise, a phase of the Battle of Sambre. (details) | |
| Western | Battle of Thierache, a phase of the Battle of Sambre. (details) | |
| November 6–11 | Western | Advance to the Meuse. |
| November 9 | Politics | Germany: Kaiser William II abdicates;republic proclaimed.[79] (details) |
| November 10 | Politics | Austria-Hungary: Kaiser Charles I abdicates. (details) |
| Balkan | Romania renews the war against the Central Powers.[24] | |
| November 11 | Politics | At 6 am, Germany signs the Armistice of Compiègne.End of fighting at 11 a.m..[80] (details) |
| Politics | Poland proclaimed. | |
| November 12 | Politics | Austria proclaimed a republic. |
| November 14 | Politics | Czechoslovakia proclaimed a republic. (details) |
| Naval | German U-boats interned. | |
| African | Three days after the armistice, fighting ends in the East African theatre when General von Lettow-Vorbeck agrees a cease-fire on hearing of Germany's surrender. (details) | |
| November 18 | Politics | Alexander Kolchak seizes control of the Provisional All-Russian Government in a coup. |
| November 21 | Naval | Germany'sHochseeflotte surrendered to the United Kingdom.[77] (details) |
| November 22 | Western | The Germans evacuateLuxembourg. |
| November 25 | African | 11 days after agreeing a cease-fire, General von Lettow-Vorbeck formally surrenders his undefeated army at Abercorn in present-day Zambia. (details) |
| November 27 | Western | The Germans evacuateBelgium. |
| December 1 | Politics | Kingdom of Serbs, Croats and Slovenes proclaimed. (details) |
| Dates | Theater/Front/Campaign | Events |
|---|---|---|
| January 5 | Asian and Pacific | Hermann Detzner surrenders at theFinschhafen District ofNew Guinea. |
| January 10 | Middle Eastern | Fakhri Pasha surrenders at Medina. (details) |
| January 18 | Politics | Treaty of Versailles between the Allies and Germany: the Peace Conference opens in Paris.[81] (details) |
| January 25 | Politics | Proposal to create theLeague of Nations accepted. (details) |
| January 27 | Politics | The Czechoslovak Legion assumes complete control of the Trans-Siberian Railway. |
| June 21 | Naval | German High Seas Fleet (53 ships) scuttled in Scapa Flow with nine deaths, the last casualties of the war.[77] (details) |
| June 28 | Politics | Treaty of Versailles signed.[82] (details) |
| July 8 | Politics | Germany ratifies the Treaty of Versailles.[83] (details) |
| July 21 | Politics | The United Kingdom ratifies the Treaty of Versailles.[84] (details) |
| November 10–11 | Politics | A Banquet in Honour of The President of theFrench Republic is hosted byKing George V and held atBuckingham Palace during the evening hours of November 10. The very firstArmistice Day is held on the Grounds of Buckingham Palace on the Morning of November 11. This will set the trend for the laterRemembrance Day. (details) |
| November 14 | Politics | The Bolsheviks take Omsk. Kolchak's retreat east is impeded by the Czechoslovaks denying him use of the Trans-Siberian. |
| Dates | Theater/Campaign/Front | Events |
|---|---|---|
| January 4 | Politics | A coup inIrkutsk deposes Kolchak. (details) |
| January 10 | Politics | First meeting of the League of Nations held in London. (details) |
| Politics | Free City of Danzig established.[85] (details) | |
| January 20 | Politics | Irkutsk surrenders to the Bolsheviks. |
| January 21 | Politics | TheParis Peace Conference ends. (details) |
| February 7 | Politics | Armistice between the Bolsheviks and the Czechoslovak Legion. The Czechoslovaks surrender the Russian gold reserves and Kolchak in return for free passage to Vladivostok. Kolchak and his Prime Minister,Viktor Pepelyayev are executed. |
| February 10 | Politics | A plebiscite returnsNorthern Schleswig to Denmark.[86] (details) |
| April 19–26 | Politics | Conference ofSanremo, Italy, about League of Nations mandates in former Ottoman territories of the Middle East. (details) |
| June 4 | Politics | Treaty of Trianon between the Allies and Hungary. (details) |
| August 10 | Politics | Treaty of Sèvres between the Allies and the Istanbul Government of Ottoman Empire against objections of Turkish National Assembly. Eventually the treaty is not approved by Turkish National Assembly. Istanbul government was considered illegitimate by theTurkish national movement and Turkish National Assembly since Istanbul was occupied, Chamber of Deputies was raided, deputies were taken prisoner at Malta by allies at that time.[87] (details) |
| September 8 | Politics | Gabriele D'Annunzio proclaims in Fiume theItalian Regency of Carnaro. (details) |
| November 1 | Politics | League of Nations headquarters moved toGeneva, Switzerland. (details) |
| November 12 | Politics | Treaty of Rapallo between Italy and Yugoslavia.Zadar is annexed by Italy and theFree State of Fiume is established. (details) |
| November 15 | Politics | The League of Nations holds its first general assembly. (details) |
| Dates | Campaign/Front/Theater | Events |
|---|---|---|
| 1921 | ||
| October 13 | Politics | Treaty of Kars between Bolshevik Russia andTurkey. (details) |
| 1922 | ||
| February 6 | Politics | Washington Naval Treaty, limiting naval tonnage, signed by France, Italy, Japan, the United Kingdom and the United States. (details) |
| April 10 – May 19 | Politics | Genoa Conference. Representatives of 34 countries discuss economics in the wake of the Great War. (details) |
| April 16 | Politics | Treaty of Rapallo between Germany and Bolshevik Russia to normalize diplomatic relations. (details) |
| September 11 | Politics | Treaty of Kars ratified in Yerevan, Armenia. (details) |
| 1923 | ||
| June 16 | Politics | TheRussian Civil War ends. |
| July 24 | Politics | Treaty of Lausanne between the Allies and Turkey, successor State to the Ottoman Empire. It supersedes the Treaty of Sèvres.[88] (details) |
| 1924 | ||
| January 27 | Politics | Treaty of Rome between Italy and Yugoslavia.Fiume is annexed by Italy and the neighbouring town ofSušak is assigned to Yugoslavia. (details) |
| March 3 | Politics | TheOttoman caliphate is dissolved ending theOttoman Empire. |
| 2010 | ||
| October 3 | Politics | Germany makes final reparations payments. (details) |