NATO | Russia |
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Relations between theNATOmilitary alliance and theRussian Federation were established in 1991 within the framework of theNorth Atlantic Cooperation Council. Russia–NATO co-operation grew during the 1990s and early 2000s. Russia joined thePartnership for Peace program in 1994. TheNATO–Russia Founding Act was signed in 1997, creating the NATO–Russia Permanent Joint Council (PJC) through which they consulted each other and worked together on security issues.[1] This was replaced in 2002 by theNATO–Russia Council. During this period, there were suggestions ofRussia becoming a NATO member. However, relations have become hostile, largely due toRussia's attacks on Ukraine since 2014.
Relations took a downturn duringthe 2nd term of Russian presidentVladimir Putin, following the 2005Orange Revolution inUkraine. In his2007 Munich speech, Putin condemned the easternenlargement of NATO, and in 2008Russia invaded Georgia. Relations worsened in 2014, whenRussia annexed Crimea andinvaded eastern Ukraine, starting theWar in Donbas. NATO responded by suspending co-operation, and many member states imposed sanctions on Russia. To deter further Russian aggression, a small NATOtripwire force wasdeployed in the Baltic states and Poland, at the request of those countries. Some political analysts see this as the beginning of aSecond Cold War. Over the following years there was a rise in military incidents, while Russia repeatedly probed NATO defenses and carried out covert assassinations in NATO countries. A few NATO members began helping Ukraine's military of their own accord.
In 2021, Russiamassed troops on Ukraine's borders. That October, NATO expelled eight Russian officials from its headquarters for alleged spying; in retaliation, Russia suspended its mission to NATO and ordered the closure of the NATO office inMoscow.[2][3] Putinfalsely claimed that NATO was building up its military infrastructure in Ukraine and would attack Russia. That December, Russiaissued far-reaching demands to NATO. The alliance rejected some but offered to negotiate others if Russia stopped its military buildup. Some Western analysts suggested Putin was using NATO as an excuse forRussian expansionism.
Russia invaded Ukraine in February 2022, starting thelargest war in Europe since World War II and causing a breakdown of NATO-Russia relations. At the2022 NATO summit, the alliance declared Russia "a direct threat to Euro-Atlantic security" and announced it was bolstering its defenses on its eastern borders.[4] Many NATO member states imposed further sanctions on Russia and sentmilitary aid to Ukraine to help it resist the invasion. Although Russian officials and propagandists claim that NATO iswaging a "proxy war" against them,[5][6] NATO maintains that its focus is on helping Ukraine and the alliance defend itself, not on fighting Russia.[7][8]
Since the invasion of Ukraine, tensions have escalated intoRussian hybrid warfare against NATO member states, which includessabotage, assassination plots,airspace violations,cyberattacks, anddisinformation aimed at destabilizing the alliance and disrupting aid to Ukraine.[9]

Following theTreaty on the Final Settlement with Respect to Germany which dissolved theAllied Control Council and theCouncil of Foreign Ministers, NATO and theSoviet Union began to engage in talks on several levels, including a continued push for arms control treaties such as theTreaty on Conventional Armed Forces in Europe. There were also conversations regarding the NATO's role in the changing security landscape in Europe, with U.S.President George H.W. Bush, U.S. Secretary of StateJames Baker, West German chancellorHelmut Kohl, West German foreign ministerHans-Dietrich Genscher, andDouglas Hurd, the British foreign minister. The West German foreign minister, Hans-Dietrich Genscher, in a meeting on February 6, 1990, suggested the alliance should issue a public statement saying that, "NATO does not intend to expand its territory to the East."[10] In 1990–91, Western policy makers did indeed operate on a premise that NATO had no purpose in expanding to Eastern Europe, and that such a move would badly hurt long-term prospects for stability and security in the Soviet Union and Eastern Europe.[11] According to several news reports and memoirs of politicians, in 1990, during negotiations aboutGerman reunification, the administration of then-US PresidentGeorge H.W. Bush made a ‘categorical assurance’ to the then-President of the Soviet Union,Mikhail Gorbachev: If Gorbachev agreed that a reunified Germany was part of NATO, then NATO would not enlarge further east to incorporate theWarsaw Pact countries in the alliance. The rationale was to allow for ‘a non-aligned buffer zone’ between the Soviet border and that of the NATO states.[12] After the fall of the Soviet Union and the dissolution of theWarsaw Pact, Gorbachev denied those claims and stated that the promise from NATO not to enlarge eastward is a myth. He also said, "The decision for the U.S. and its allies to expand NATO into the east was decisively made in 1993. I called this a big mistake from the very beginning. It was definitely a violation of the spirit of the statements and assurances made to us in 1990."[13] In 1992, i.e. only a few months after theUSSR disintegrated, the US openly expressed intention to invite formerWarsaw Pact countries into NATO.[14]

Soviet Foreign MinisterEduard Shevardnadze made a first visit toNATO Headquarters on 19 December 1989, followed by informal talks in 1990 between NATO and Soviet military leaders.[15] In June 1990 theMessage from Turnberry, often described as "the first step in the evolution of [modern] NATO-Russia relations", laid the foundation for future peace and cooperation.[16] In July 1990, NATO Secretary-GeneralManfred Wörner visited Moscow to discuss future cooperation.[17] In November 1990, theSoviet Union and NATO states signed theTreaty on Conventional Armed Forces in Europe.
Formal contacts and cooperation between the newly foundedRussian Federation and NATO began following thedissolution of the Soviet Union in 1991, within the framework of theNorth Atlantic Cooperation Council (later renamedEuro-Atlantic Partnership Council), and were further deepened as Russia joined the Partnership for Peace program on 22 June 1994.[18][19][20][21]
In September 1994, Yeltsin addressed the UN General Assembly and mentioned the role of theConference on Security and Co-operation in Europe (CSCE) in European security. Russia had previously proposed increasing the role of the CSCE to the detriment of NATO. Yeltsin's national security aide Yuri Baturin noted that after the end of the Cold War, "the time of NATO has passed," and therefore the alliance "should change its mechanisms and goals taking into account Russia's military and political weight". Baturin believed that "a new mechanism of European security could be born from the combination of the CSCE and NATO, where the CSCE bodies would represent the political and diplomatic part, and NATO bodies would represent the military part". But Yeltsin himself did not make such a statement.[22][non-primary source needed]
Yeltsin had thought that the Partnership for Peace would be an alternative to NATO membership rather than a path to it, and after it was announced in December 1994 by NATO that this is not the case, he began to oppose eastward NATO enlargement. Yeltsin adopted opposition to NATO enlargement as official policy in 1995. However, he continued efforts to cooperate with NATO, including signing of theNATO–Russia Founding Act in 1997.[23]

In late 1995 the U.S. and Russia reached an agreement for the Russian military to participate in theImplementation Force, the NATO peacekeeping mission inBosnia and Herzegovina tasked with ensuring the implementation of theDayton Agreement that ended theBosnian War.[24] On 15 October 1995, aRussian General Staff delegation arrived at theSupreme Headquarters Allied Powers Europe (SHAPE) inMons, Belgium, and made the command and control arrangements for the deployment of Russian troops. A Russian general and his staff were appointed to SHAPE, with the general being given the position of Deputy to theSupreme Allied Commander Europe (SACEUR) for Russian Forces. A brigade of theRussian Airborne Forces was put together for the mission and was under the tactical control ofMulti-National Division (North), led by a U.S. general, and under the operational command of SACEUR through his Deputy for Russian Forces.[25][26] It was the first time the Russian military participated in a NATO operation[26] and the first joint military operation between Russia and the countries of NATO since World War II.[27]
The Russian involvement in Bosnia and the presence of a Russian military staff at NATO's headquarters was praised by both sides as a success, and GeneralGeorge Joulwan, the NATO supreme commander at the time, said that this contributed to the signing of the NATO-Russia Founding Act the following year.[28]

On27 May 1997, at theNATO Summit in Paris, NATO leaders and Russian presidentBoris Yeltsin signed the "Founding Act on Mutual Relations, Cooperation and Security" (NATO-Russia Founding Act), a road map for NATO-Russia cooperation. The act had five main sections, outlining the principles of the relationship, the range of issues on which NATO and Russia would work together, the military dimensions of the relationship, and the ways to foster greater military-military cooperation.[29][30]
Yeltsin said the agreement would "protect Europe and the world from a new confrontation and will become the foundation for a new, fair a stable partnership". United States National Security AdviserSandy Berger called it a "win-win agreement" and said it showed that "a new NATO would work with a new Russia to build a new Europe".[31] Though Yeltsin called NATO enlargement a mistake, he said "the negative consequences of NATO's enlargement will be reduced to the minimum through the NATO–Russia deal".[32]
The Founding Act affirms that "NATO and Russia do not consider each other as adversaries", and that they "will build together a lasting and inclusive peace in the Euro-Atlantic area on the principles of democracy and cooperative security".[33] It acknowledges that "NATO has expanded and will continue to expand its political functions".[34] The Founding Act states that NATO has "no intention, no plan and no reason" to station nuclear weapons on the territory of new member states; meaning new NATO members cannot participate in the alliance'snuclear weapons sharing.[35]
The Act established a forum called the "NATO-Russia Permanent Joint Council" (PJC) for bilateral NATO-Russia discussions, consultations, cooperation and consensus-building.[35][36] This gave Russia a voice in NATO, but not a veto over its internal affairs;[35] likewise, NATO could not veto any actions of Russia. Russia's Permanent Mission to NATO was set up inBrussels, including the office of Russia's Chief Military Representative to NATO.[35]
As part of the efforts of the PJC, the NATO-Russia Glossary of Contemporary Political and Military Terms was created in 2001.[37] The glossary was the first of several such publications on topics such as missile defense, demilitarization, and counteringillicit drugs to encourage transparency in NATO-Russia Relations, foster mutual understanding, and facilitate communication between NATO and Russia contingents.[38] The Glossary of Contemporary Political and Military Terms was especially timely given the NATO and Russia cooperative efforts inBosnia and Herzegovina andKosovo.[37][39]
Some analysts have argued that since the 2014Russian annexation of Crimea the Founding Act has been a "dead letter".[40]
In 1999, Russia condemned theNATO bombing of Yugoslavia,[41][42] which was done without a prior authorization by theUnited Nations Security Council, required by the international law.[43] For many in Moscow, a combination of NATO’s incorporation of Eastern Europe and its military attack on sovereignYugoslavia exposed American promises of Russia’s inclusion into a new European security architecture as a deceit. Yeltsin’s critics said: ‘Belgrade today, Moscow tomorrow!’[14]
Russian PresidentBoris Yeltsin said that NATO's bombing of Yugoslavia "has trampled upon the foundations of international law and the United Nations charter."[44] TheKosovo War ended on 11 June 1999, and a joint NATO-Russian peacekeeping force was to be installed inKosovo. Russia had expected to receive a peacekeeping sector independent of NATO, and was angered when this was refused. There was concern that a separate Russian sector might lead to a partition of Kosovo between aSerb-controlled north andAlbanian south.[45] From 12 to 26 June 1999, there was abrief but tense stand-off between NATO and the RussianKosovo Force in which Russian troops occupied the Pristina International Airport.[46][47]
In 2001, following theSeptember 11 attacks against the United States, Russian President Vladimir Putin reached out to PresidentGeorge W. Bush, the President of the United States at the time. This was the height of U.S.-Russian relations since the end of the Cold War. Russia even shared intelligence that they had with the United States, which proved vital to the U.S. forces in Afghanistan.[citation needed] As a member of NATO, the United States' newly positive relationship with Russia would positively impact Russian-NATO relations.[48]
The US unilaterally withdrew from theAnti-Ballistic Missile Treaty with Russia in 2001–2002. This treaty had greatly limited each country'sABM systems, which are used to shoot down long-range attacking missiles. The US withdrew so it could build new ABM systems to shield NATO from missiles launched by Iran and "rogue states". The US signed bilateral agreements with Poland and Romania (with NATO support) to build ballisticmissile defense (BMD) systems in their territories, against Russian wishes. None of this depended on NATO enlargement; the US also has BMD agreements with many non-NATO members (including Bahrain, Egypt, Israel, Japan, Kuwait, Saudi Arabia, South Korea, Taiwan, and the United Arab Emirates). This withdrawal was interpreted by the Russian political elite, and by many Western political scientists, as US exploitation of political and military weakness in Russia at the time. Some analysys say it led to the loss of Russia's trust in America's intentions.[14]

The NATO-Russia Council (NRC) was created on 28 May 2002 during the2002 NATO Summit in Rome. The NRC was designed to replace the PJC as the official diplomatic tool for handling security issues and joint projects between NATO and Russia.[49] The structure of the NRC provided that the individual member states and Russia were each equal partners and would meet in areas of common interest, instead of the bilateral format (NATO + 1) established under the PJC.[50]
Cooperation between Russia and NATO focused on several main sectors: terrorism, military cooperation,Afghanistan (including transportation by Russia of non-militaryInternational Security Assistance Force freight (seeNATO logistics in the Afghan War), and fightinglocal drug production), industrial cooperation, and weapons non-proliferation.[51] As a result of its structured working groups across a range of areas, the NRC served as the primary forum for consensus-building, cooperation, and consultation on topics such as terrorism, proliferation, peacekeeping, airspace management, and missile defense.[50][52]
"Joint decisions and actions", taken under NATO-Russia Council agreements, include:
Notably, on a press conference on 28 May 2002 NATO Summit, president Putin was asked about Ukraine's intention to join NATO and answered that "our position on expansion of NATO is known, but Ukraine should not stand aside of the global processes to strengthen the world security and, as a sovereign country, it's able to make its own choices in ensuring its security". He also added he "doesn't see anything controversial or hostile" in Ukraine's plans.[57][58]
NATO–Russia relations took a downturn during the second presidential term of Russian president Putin, following the UkrainianOrange Revolution in 2004–2005 and theRusso-Georgian War in 2008. Against these headwinds, calls from within the ranks of the US military to increase collaboration fell on hard ground.[59] In this period, Russia undertook several hostile trade actions against Ukraine (see#Trade and economy below). Several highly-publicised murders of Putin's opponents also occurred in that period, marking his increasingly authoritarian rule (see#Ideology and propaganda below).
TheBaltic states ofEstonia,Latvia andLithuania, formerly part of the Soviet Union, joined NATO in 2004. After this, no other countries bordering Russia joined NATO for almost twenty years.
Russian president Putin said in May 2005,
"I do not really understand exactly how ... the expansion of NATO to take in our Baltic neighbors can bring greater security. If other former Soviet republics want to join NATO, our attitude will remain the same. But I want to stress that we will respect their choice because it is their sovereign right to decide their own defense policy and this will not worsen relations between our countries".[60]
In September 2005, a RussianSu-27 fighter jet veered off course and crashed in Lithuania, which had joined NATO the year before. NATO planes were too slow to intercept the aircraft.[61]

In 2006, Russian intelligence performed an assassination on the territory of a NATO member state: the United Kingdom. On 1 November 2006,Alexander Litvinenko, a British-naturalised Russiandefector and former officer of the RussianFederal Security Service (FSB) who specialised in tacklingorganized crime and advised British intelligence and coined the term "mafia state",suddenly fell ill and was hospitalised after poisoning withpolonium-210; he died from the poisoning on 23 November.[62] A British murder investigation identifiedAndrey Lugovoy, a former member of Russia'sFederal Protective Service (FSO), as the main suspect.Dmitry Kovtun was later named as a second suspect.[63] The United Kingdom demanded that Lugovoy be extradited, however Russia denied the extradition as theRussian constitution prohibits the extradition of Russian citizens, leading to a straining ofrelations between Russia and the United Kingdom.[64]

At the 43rdMunich Security Conference in February 2007, Russian president Putin gave a landmark speech in which he rejected Europe's post-Cold War security architecture.[65] Putin condemned NATO eastern enlargement, claiming that "NATO has put its frontline forces on our borders ... a serious provocation that reduces the level of mutual trust". He also condemned plans for aNATO missile defense system in Europe, saying that Russia'sballistic missiles could overcome any defense shield. The speech marked a shift in Russia-NATO relations under Putin.[66]
Russia announced in July 2007 that it would no longer adhere to theAdapted Conventional Armed Forces in Europe Treaty (CFE Treaty) because NATO had still not ratified it. NATO had said it would not ratify the treaty until Russia ended itsoccupation of Moldova andGeorgia.[66] Russia continued to reject the principle of consent for its troop presence in Georgia and Moldova, and began ignoring Vienna Convention limits on troop concentrations, military exercises and transparency.[65]
In 2008, Russia condemnedKosovo's declaration of independence,[67] stating they "expect the UN mission and NATO-led forces in Kosovo to take immediate action to carry out their mandate ... including the annulling of the decisions of Pristina's self-governing organs and the taking of tough administrative measures against them."[68] Putin described the recognition of Kosovo's independence by several major world powers as "a terrible precedent, which willde facto blow apart the whole system of international relations". He added: "it is a two-ended stick and the second end will come back and hit them in the face".[69]

In early 2008, U.S. PresidentGeorge W. Bush vowed full support for admittingGeorgia andUkraine into NATO, to the opposition of Russia.[70][71] The Russian government claimed that Ukraine and Georgia joining NATO may harm European security. At the time, opinion polls found that Russians were mostly opposed to any eastward enlargement of NATO.[72][73] Russian PresidentDmitry Medvedev stated in 2008 that "no country would be happy about a military bloc to which it did not belong approaching its borders".[74] Russia's Deputy Foreign MinisterGrigory Karasin warned that Ukraine joining NATO would cause a "deep crisis" inRussia–Ukraine relations and also harm Russia's relations with the West.[75]

Relations between NATO and Russia soured in summer 2008 due toRussia's war against Georgia. The North Atlantic Council condemned Russia for occupying parts of Georgia and recognizing theSouth Ossetia andAbkhazia regions of Georgia as independent states.[76] The Secretary General of NATO said Russia's recognition of violated numerous UN Security Council resolutions, including resolutions endorsed by Russia itself: theUN Charter, theCSCE Helsinki Final Act of 1975 and others.[77] Russian media heavily stressed the precedent of the recentKosovo declaration of independence.[citation needed]
In 2011, Russian president Medvedev said that Russia's2008 invasion of Georgia had thwarted the country's plans to join NATO.[78]
In January 2009, the Russian envoy to NATODmitry Rogozin said the NATO-Russia council was "a body where scholastic discussions were held." A US official shared this view, stating: "We want now to structure cooperation more practically, in areas where you can achieve results, instead of insisting on things that won't happen."[79]
Relations were further strained in May 2009 when NATO expelled two Russian diplomats over accusations of spying. Tensions also flared over a planned NATO training exercise calledCooperative 09 atVaziani Military Base in Georgia. Russian presidentDmitry Medvedev said, "The planned NATO exercises in Georgia, no matter how one tries to convince us otherwise, are an overt provocation. One cannot carry out exercises in a place where there was just a war".[80]
In September 2009, the Russian government said that a proposedNATO missile defense system basedin Poland and in theCzech Republic could threaten its own defences. TheRussian Space Forces commander,Colonel GeneralVladimir Popovkin stated in 2007 that "[the] trajectories ofIranian orNorth Korean missiles would hardly pass anywhere near the territory of the Czech republic, but every possible launch of RussianICBMs from the territory ofEuropean Russia, or made byRussian Northern Fleet would be controlled by the [radar] station".[81][82] However, later in 2009, US presidentBarack Obama canceled the anti-missile shield in Poland and the Czech Republic after Russia threatened the US with military response, and warned Poland that by agreeing to NATO's anti-missile system, it was exposing itself to a strike or nuclear attack from Russia.[82]
In December 2009, NATO approached Russia for help in Afghanistan, requesting permission for the alliance to fly cargo (including possibly military ones) over Russian territory to Afghanistan and to provide more helicopters for theAfghan armed forces.[83] However, Russia only allowed transit of non-military supplies through its territory.[84]
In May 2011, NATO and Russia carried out their first joint submarine exercise, and in June 2011, NATO and Russia participated in their first joint fighter jet exercise, dubbed "Vigilant Skies 2011".[85]
The2011 military intervention in Libya was criticized by Russian president Dmitry Medvedev[86] and Russian prime minister Vladimir Putin, who said that "[UNSC Resolution 1973] is defective and flawed...It allows everything. It resembles medieval calls for crusades."[87]
In April 2012,Left Front protested in Russia over their country's co-operation with NATO.[88]
Russia–NATO relations became hostile from 2014, whenRussia annexed Crimea andinvaded eastern Ukraine, starting theWar in Donbas. NATO then ended co-operation, and many member states imposed sanctions on Russia. To deter further Russian aggression, a small NATO force wasdeployed in the Baltic states and Poland for the first time, at the request of those countries. Some political analysts see this as the beginning of aSecond Cold War. Over the following years there was a rise in military incidents, while Russia repeatedly probed NATO defenses and carried out covert assassinations in NATO countries. A few NATO members began training and arming Ukraine's military of their own accord. Russia alsointervened in the Syrian civil war in support of theBa'athist regime, while some NATO members independently intervened in support of theSyrian opposition.[89]

In February–March 2014, during Ukraine'sRevolution of Dignity, Russian soldiers without insigniaoccupied Crimea, a territory of Ukraine. The soldiersseized Crimea's parliament, which then installed a pro-Russian government. Adisputed referendum on Crimea's status was held under Russian occupation. According to the Russian-installed authorities, the result was overwhelmingly in favor of joining Russia, which thenannexed Crimea. NATO told Russia to stop its actions and said it supported Ukraine's territorial integrity and sovereignty.[90]
In hisCrimea speech on 19 March 2014, Russian president Putin said that thedissolution of the Soviet Union had "robbed" Russia of territory and called this an "outrageous historical injustice". He said "we are against having a military alliance making itself at home right in our backyard or in our historic territory. I simply cannot imagine that we would travel toSevastopol to visit NATO sailors".[91]
NATO Secretary GeneralAnders Fogh Rasmussen said in a speech on 19 March 2014:
The annexation of Crimea through a so-called referendum held at gunpoint is illegal and illegitimate. ... it undermines our security. Not just NATO's or Ukraine's security, but also Russia's. If the rules don't apply, if agreements are not honored, certainly Russia also stands to suffer the consequences. ... Russia was among those whocommitted in 1994 to respect Ukraine's territorial integrity and sovereignty. Russia pledged not to threaten or use force against Ukraine. By turning its back on that agreement, Russia has called into question its credibility and reliability ... No one wants to turn away from our cooperation with Russia. But no one can ignore that Russia has violated the very principles upon which that cooperation is built.[92]
On 1 April 2014, NATO foreign ministers issued a joint statement announcing:
We, the Foreign Ministers of NATO, are united in our condemnation of Russia's illegal military intervention in Ukraine and Russia's violation of Ukraine's sovereignty and territorial integrity. We do not recognize Russia's illegal and illegitimate attempt to annex Crimea. ... We have decided to suspend all practical civilian and military cooperation between NATO and Russia. Our political dialogue in the NATO-Russia Council can continue, as necessary.[93][94]
Russia used Kosovo's declaration of independence as a justification for recognizingthe independence of Crimea, citing the so-called "Kosovo independence precedent".[95][96]
On 28 March 2014,Jens Stoltenberg was elected to became next NATO Secretary-General later in the year. Stoltenberg emphasized that Russia's invasion of Crimea was a "brutal reminder of the necessity of NATO," stating that Russia's actions were "the first time since the Second World War that a country hasannexed a territory belonging to another country."[97] Stoltenberg highlighted the need for NATO having a sufficiently strong military capacity to deter Russia. He further said that Ukraine's possible NATO membership would be "a very important question" in the near future.[98]

Shortly after the Crimean annexation, in April 2014towns and cities were seized in Ukraine's Donbas region by heavily-armedRussian paramilitaries. Their commander,Igor 'Strelkov' Girkin admitted that this sparked theWar in Donbas,[99] as Ukraine soon launched an operation to retake the territory. On 25 April, the militants kidnapped eightOSCE observers and held them captive, claiming they were "NATO spies".[100]
In late August 2014, NATO released satellite imagery showing Russian forces operating inside Ukraine (see2014 Russian invasion of the Donbas). NATO also said that "large quantities of advanced weapons, including air defence systems, artillery, tanks, and armoured personnel carriers [are] being transferred to separatist forces". NATO Brigadier General Nico Tak said "Russia's ultimate aim is to alleviate pressure on separatist fighters in order to prolong this conflict".[101] Russia denied the claims. Because of the invasion, Ukraine's government said it will ask parliament to drop the country's neutral status and put it on a path towards NATO membership.[102]
AtNATO's Wales summit in early September 2014, NATO Secretary General Rasmussen said "Russia is now fighting against Ukraine, in Ukraine. Russian troops and Russian tanks are attacking the Ukrainian forces. And while talking about peace, Russia has not made one single step to make peace possible".[103] The new NATO-Ukraine Commission issued a statement condemning Russia's actions and saying "Russia must end its support for militants in eastern Ukraine, withdraw its troops and stop its military activities along and across the Ukrainian border".[104][105]
On 2 December 2014, NATO foreign ministers announced that a work had begun on creating a rapid reaction force which could deploy wherever needed at short notice.[106] In June 2015, NATO tested the new rapid reaction force for the first time in Poland, with more than 2,000 troops from nine states taking part in the exercise.[107][108]

In the months after the Crimea annexation, there was an increase in Russian military aircraft flying toward NATO airspace, and it was reported that close encounters between Russian and NATO military aircraft had risen to "cold war levels". According to a report released in November 2014, "a dangerous game of brinkmanship is being played, with the potential for unintended escalation in what is now the most serious security crisis in Europe since the cold war".[109] It highlighted 40 dangerous or sensitive incidents recorded in the eight months alone, including a near-collision between a Russian reconnaissance plane and a passenger plane taking off from Denmark in March with 132 passengers on board.[109] An unprecedented increase[110] in Russianair force and naval activity in the Baltic region prompted NATO to step up its longstanding rotation of military jets in Lithuania.[111] There was similar heightened Russian air force activity in theAsia-Pacific region, relying on the resumed use of the formerly-abandoned Sovietmilitary base atCam Ranh Bay,Vietnam.[112] In March 2015, Russia's defense ministerSergei Shoigu said that Russia's long-range bombers would continue patrolling various parts of the world and expand into other regions.[113]
In July, the U.S. formally accused Russia of having violated the 1987Intermediate-Range Nuclear Forces (INF) Treaty by testing a prohibited medium-range ground-launchedcruise missile (presumably R-500,[114] a modification ofIskander)[115] and threatened to retaliate accordingly.[115][116] In early June 2015, theU.S. State Department reported that Russia had failed to correct the violation of the I.N.F. Treaty; the U.S. government was said to have made no discernible headway in making Russia so much as acknowledge the compliance problem.[117]
The US government's October 2014 report claimed that Russia had 1,643nuclear warheads ready to launch (an increase from 1,537 in 2011) – one more than the US, thus overtaking the US for the first time since 2000; both countries' deployed capacity being in violation of the2010 New START treaty that sets a cap of 1,550 nuclear warheads.[118] Likewise, even before 2014, the US had set about implementing a large-scale program, worth up to a trillion dollars, aimed at overall revitalization of itsatomic energy industry, which includes plans for a new generation of weapon carriers.[119][120]
In 2014,two explosions of ammunition depots occurred inVrbětice,Vlachovice, in theZlín District of theCzech Republic, a NATO member.[121] The first explosion occurred on 16 October, and the second on 3 December. Two people were killed in the first explosion. The cleanup of unexploded ammunition left by the blasts was finished on 13 October 2020.[122] According to theSecurity Information Service and thePolice of the Czech Republic, two agents fromGRU Unit 29155 were involved in the explosions, with the motivation of disrupting weapons supplies to Ukraine.[123][124] In 2024, Czech president Petr Pavel declared that the investigations and information available to him confirm the event to be a Russian attack on Czech (thus NATO) soil.[125]
At the end of 2014, Putin approved a revisednational military doctrine, which listed a NATO military buildup near Russia's borders as the top military threat.[126][127]

In January 2015, the UK, Denmark, Lithuania and Estonia called on the European Union to jointly confrontRussian propaganda by setting up a "permanent platform" to work with NATO in strategic communications and boost local Russian-language media.[128] NATO took a radically new position on propaganda and counter-propaganda in 2015, that "Entirely legal activities, such as running a pro-Moscow TV station, could become a broader assault on a country that would require a NATO response under Article Five of the Treaty."[129] It was reported that "as part of the hardened stance, Britain has committed £750,000 of UK money to support a counter-propaganda unit at NATO's headquarters in Brussels."[130]
NATO Secretary-General Stoltenberg called for more cooperation with Russia in the fight against terrorism following the deadlyJanuary 2015 Île-de-France attacks.[131]
In early February 2015, NATO diplomats said that concern was growing in NATO over indications that Russia's nuclear strategy appeared to point to a lowering of the threshold for using nuclear weapons in any conflict.[132] The conclusion was followed by British Defense SecretaryMichael Fallon saying that Britain must updateits nuclear arsenal in response to Russian modernization of its nuclear forces.[133] Later in February, Fallon said that Putin could repeat tactics used in Ukraine in Baltic members of the NATO alliance; he also said: "NATO has to be ready for any kind of aggression from Russia, whatever form it takes. NATO is getting ready."[134] Fallon noted that it was not anew Cold War with Russia, as the situation was already "pretty warm".[134]
In March 2015, Russia, citing NATO's alleged breach of the 1990Treaty on Conventional Armed Forces in Europe, said that the suspension of its participation in it, announced in 2007, was now "complete".[135][136]
In spring, the Russian Defense Ministry announced it was planning to deploy more forces in occupied Crimea to reinforce itsBlack Sea Fleet, including re-deployment of nuclear-capable TupolevTu-22M3 ('Backfire') long-range strike bombers.[137] April 2015 saw the publication of leaked information ascribed to semi-official sources within the Russian military and intelligence establishment, about Russia's alleged preparedness for a nuclear response to certain non-nuclear attacks on the part of NATO; such implied threats were interpreted as "an attempt to createstrategic uncertainty" and undermine Western political cohesion.[138][139]
Between 28 April and 4 May 2015, the Russian GRUUnit 29155 perpetrated inSofia (thus on NATO soil) the poisoning withNovichok of Bulgarian arms dealerEmilian Gebrev, who was supplying arms to Ukraine and Georgia.[140] Gebrev, his son and his factory manager survived two poisoning attempts.[141][142]
In June 2015, an independent Russian military analyst was quoted by a major American newspaper as saying:
Everybody should understand that we are living in a totally different world than two years ago. In that world, which we lost, it was possible to organize your security with treaties, with mutual-trust measures. Now we have come to an absolutely different situation, where the general way to ensure your security ismilitary deterrence."[143]
In June 2015, US Defence SecretaryAshton Carter said the US would deploy heavy weapons, including tanks, armoured vehicles and artillery, in Bulgaria, Estonia, Latvia, Lithuania, Poland, and Romania. This would be done with the agreement of those countries, and was to reassure NATO's eastern members in response to Russia's war against Ukraine.[144] The move was interpreted by Western commentators as marking the beginning of a reorientation of NATO's strategy.[145] It was called by a senior Russian Defence Ministry official "the most aggressive act by Washington since the Cold War"[146] and criticized by the Russian Foreign Ministry as "inadequate in military terms" and "an obvious return by the United States and its allies to the schemes of 'the Cold War'".[147]
On its part, the U.S. expressed concern over Putin's announcement of plans to add over 40 new ballistic missiles to Russia's nuclear weapons arsenal in 2015.[146] American observers and analysts such asSteven Pifer said the US had no reason for alarm about the new missiles, as long as Russia remained within the limits of the 2010 New Strategic Arms Reduction Treaty (New START). Pifer saw the nuclear saber-rattling by Russia's leadership as mainly bluff and bluster designed to conceal Russia's weaknesses;[148] however, Pifer suggested that the most alarming motivation behind this rhetoric could be Putin seeing nuclear weapons not merely as tools of deterrence, but as tools of coercion.[149]
In November 2015, NATO's top military commander US GeneralPhilip Breedlove said the alliance was "watching for indications" that Russia could move any of itsnuclear arsenal to Crimea.[150] In December, Russian Foreign MinisterSergey Lavrov said re-deployment of nuclear-capable TupolevTu-22M3 ('Backfire') long-range strike bombers to Crimea would be a legitimate action because "Crimea has now become part of [Russia]".[151]
NATO-Russia tensions rose further after, on 24 November 2015,Turkey shot down a Russian warplane that allegedly violated Turkish airspace while on a mission in northwestern Syria.[152] Russian officials denied that the plane had entered Turkish airspace. Shortly after the incident, NATO called an emergency meeting to discuss the matter. Stoltenberg said "We stand in solidarity with Turkey and support the territorial integrity of our NATO ally".[153]
In December 2015, NATO member states formally invitedMontenegro to join the alliance, which drew a response from Russia that it would suspend cooperation with that country.[154]
By 2016, NATOinterceptions of Russian military aircraft had reached their highest rate since the Cold War.[155]
Shortly before a meeting of the NATO–Russia Council at the level of permanent representatives on 20 April, the first such meeting since June 2014,[156] Russian foreign minister Sergey Lavrov cited what he saw as "an unprecedented military buildup since the end of the Cold War and the presence of NATO on the so-called eastern flank of the alliance with the goal of exerting military and political pressure on Russia", and said "Russia does not plan and will not be drawn into a senseless confrontation and is convinced that there is no reasonable alternative to mutually beneficial all-European cooperation in security."[157][158] Russia also warned against moving defensive missiles to Turkey's border with Syria.[159] NATO secretary general, Jens Stoltenberg, said: "NATO and Russia have profound and persistent disagreements. Today's meeting did not change that."[160][161]
Thefirst site of theNATO missile defence system was opened inDeveselu,Romania, in May 2016. It was designed to shoot down long-range missiles. Russia re-stated that the U.S.-built system undermined Russia's security, was a "direct threat to global and regional security", was in violation of theINF Treaty (which Russia had violated), and that measures were "being taken to ensure the necessary level of security for Russia".[162]

The July2016 Warsaw NATO summit approved the deployment of NATO forces to the Baltic states and eastern Poland for the first time, in response to Russia's 2014 invasion of Ukraine. Four multinational battalions (3,000–4,000 troops altogether) would be deployed in NATO member states Estonia, Latvia, Lithuania and Poland. These countries had requested a permanent NATO presence to deter any Russian attack.[163] NATO stated that the deployment was meant to show "solidarity, determination, and ability to act by triggering an immediate Allied response to any aggression".[164] This became known asNATO Enhanced Forward Presence. A 2016Levada poll found that 68% of Russians think that deploying NATO troops in the former Eastern bloc countries is a threat to Russia.[165]
Leaders at the Warsaw summit "condemned Russia's ongoing and wide-ranging military build-up" in Crimea and expressed concern over "Russia's efforts and stated plans for further military build-up in the Black Sea region".[166] They also stated that Russia's "significant military presence and support for theregime in Syria", and its military build-up in the Eastern Mediterranean "posed further risks".[167] NATO leaders agreed to step up support for Ukraine: in a meeting of the NATO-Ukraine Commission, the Allied leaders reviewed the security situation with President of UkrainePetro Poroshenko, welcomed the government's plans for reform, and endorsed a Comprehensive Assistance Package for Ukraine to "help make Ukraine's defence and security institutions more effective, efficient and accountable".[168]
At the meeting of the Russia–NATO Council held shortly after the Warsaw summit, Russia warned NATO against intensifying its military activity in the Black Sea.[169] Russia also said it agreed to have its military pilots flying over the Baltic Sea turn on the cockpit transmitters, known as transponders, if NATO aircraft did likewise.[170]
In July 2016, Russia's military announced that a regiment of long-range surface-to-airS-400 weapon system would be deployed in the city ofFeodosia in Crimea in August that year, beefing up Russia'santi-access/area denial capabilities around the peninsula.[171]
Acoup d'état in the capital of Montenegro, Podgorica was allegedly planned and prepared for 16 October 2016, the day of theparliamentary election, according to Montenegro's special prosecutor.[172] In September 2017, the trial of those indicted in connection with the plot began in the High Court inPodgorica, the indictees including leaders of theMontenegrin opposition and two alleged Russian intelligence agents.Russian government officials denied any involvement.[173][174][175] It is believed that the plot was designed as a last-ditch attempt by the Montenegrin pro-Serbian and pro-Russian opposition to preventMontenegro's accession toNATO,[176] a move stridently opposed by Russia's government that had issued direct threats to Montenegro concerning such eventuality.[177][178][179][180][181] This theory was re-affirmed by the court verdict handed down in 2019.[182] The Moscow–basedRussian Institute for Strategic Studies (RISS), which has close ties to RussianForeign Intelligence Service (SVR), was mentioned by mass media as one of the organisations involved in devising the coup plot; in early November 2017, Russian presidentVladimir Putin sacked the RISS director,Leonid P. Reshetnikov, a ranking veteran officer of the SVR.[183][184] In May 2019 the thenForeign Secretary of theUnited Kingdom,Jeremy Hunt, stated:
The failed coup attempt against Montenegro in 2016 was one of the most outrageous examples of Russia’s attempts to undermine European democracy. The GRU’s brazen attempt to interfere with Montenegro’s national elections and undermine Montenegro’s application to join NATO is yet another example of destabilising and aggressive Russian behaviour over the last decade.[185]

On 18 February 2017, Russia's foreign ministerSergey Lavrov said he supported the resumption of military cooperation with NATO.[186] In late March 2017, the NATO-Russia Council met in Brussels, Belgium.[187] In July, the Council met again in Brussels. Following the meeting, NATO Secretary General Jens Stoltenberg said that Allies and Russia had had a "frank and constructive discussion" on Ukraine, Afghanistan, and transparency and risk reduction.[188] The two sides briefed each other on the upcoming Russian/BelarusianZapad 2017 exercise, and NATO's Exercise Trident Javelin 2017.[189]
In early March 2017, the US military accused Russia of breaching the INF arms control treaty by deploying a new ground-launched cruise missile, theSSC-8. GeneralPaul Selva, Vice Chairman of the US Joint Chiefs of Staff, said "The system itself presents a risk to most of our facilities in Europe and we believe that the Russians have deliberately deployed it in order to pose a threat to NATO".[190]
In August 2017, NATO declared that itsfour multinational battlegroups in Estonia, Latvia, Lithuania and Poland were fully operational, following the decision taken at the2016 Warsaw summit.[191]
TheZapad 2017 military exercises by Russia andBelarus were the first since the annexation of Crimea, and stoked fears by NATO that it could be used as cover for another invasion. UK Secretary of State for DefenceMichael Fallon warned that the exercises in Belarus andKaliningrad, on NATO's borders, were "designed to provoke us". Fallon said that the number of Russian troops taking part could reach 100,000, although they were later confirmed to be around 12,000.[192]
In February 2018, NATO Secretary GeneralJens Stoltenberg stated: "We don't see any threat [from Russia] against any NATO ally and therefore, I'm always careful speculating too much about hypothetical situations."[193] Stoltenberg welcomed the2018 Russia–United States Summit between Vladimir Putin and Donald Trump in Helsinki, Finland.[194] He said NATO is not trying to isolate Russia.[195]
In response to thepoisoning of Sergei and Yulia Skripal inSalisbury, England (thus on NATO soil) on 4 March 2018, Stoltenberg announced that NATO would be expelling seven Russian diplomats from the Russian mission to NATO in Brussels. Russia blamed the US for the NATO response.[196] The attempted assassination and subsequent agent exposures was an embarrassment for Putin and for Russia's spying organization.[197][198] It was allegedly organized by the secretUnit 29155 of the Russian GRU, under the command of Major General Andrei V. Averyanov.[199]
PresidentDonald Trump announced on 20 October 2018 that he would withdraw the US from theIntermediate-Range Nuclear Forces Treaty due to Russian non-compliance,[200][201][202] stating that Russia had breached the treaty by developing and deploying an intermediate-range cruise missile known as the SSC-8 (Novator 9M729).[203][204] The Trump administration claimed another reason for the withdrawal was to counter aChinese arms buildup in the Pacific, including within theSouth China Sea, as China was not a signatory to the treaty.[200][205][206] The US formally suspended the treaty on 1 February 2019,[207] and Russia did so on the following day in response.[208] The United States formally withdrew from the treaty on 2 August 2019.[209]
In April 2019, NATO Secretary General Stoltenberg warned a joint session of theU.S. Congress of the threat posed by "a more assertive" Russia to the alliances members, which included a massive military buildup, threats to sovereign states, the use ofnerve agents andcyberattacks.[210][211]
On 23 August 2019, another assassination was performed by Russian intelligence on NATO territory. At around midday in theKleiner Tiergarten park in Berlin, Germany,Zelimkhan Khangoshvili, an ethnic Chechen Georgian who was a former platoon commander for theChechen Republic of Ichkeria during theSecond Chechen War, and a Georgian military officer during the 2008Russo-Georgian War, was walking down a wooded path on his way back from the mosque he attended when he was shot three times—once in the shoulder and twice in the head—by a Russian assassin on a bike with a suppressedGlock 26. The bicycle, a plastic bag with the murder weapon, and a wig the perpetrator was using were dumped into theSpree.[212] The suspect, identified as 56-year-old Russian national "Vadim Sokolov" by German police, was apprehended soon after the assassination.[213][214] The Russian government and Chechen leaderRamzan Kadyrov have both been linked to the killing.[215][216]
In September 2019, Russian Foreign MinisterSergey Lavrov said that "NATO approaching our borders is a threat to Russia".[217] He was quoted as saying that if NATO accepts Georgian membership with the article on collective defense covering only Tbilisi-administered territory (i.e., excluding the Georgian territories ofAbkhazia andSouth Ossetia, both of which are currentlyunrecognized breakaway republics supported by Russia), "we will not start a war, but such conduct will undermine our relations with NATO and with countries who are eager to enter the alliance."[218]
In June 2020, NATO Secretary GeneralJens Stoltenberg stated in a speech that NATO aspires for "a constructive relationship with Russia," emphasizing that the alliance would discuss arms control with Russia diplomatically.[219]
Throughout 2020, NATO air forces intercepted the increased Russian military air patrols near allied airspace, particularly the Baltic and Black Seas. According to the 2020 NATO reports, allied aircraft scrambled more than 400 times, reportedly around 350 of which were Russian military aircraft.[220]
In August 2020, thepoisoning of Russian opposition leader Alexei Navalny led NATO to condemn the attack and to call on Russia to cooperate with the ongoing investigation under theOrganization for the Prohibition of Chemical Weapons (OPCW).[221]

From March 2021, there was a massive Russian military buildup near Ukraine's borders. On 13 April, NATO Secretary-General Jens Stoltenberg called on Russia to halt its military buildup.[222][223] Russian Defense MinisterSergey Shoygu said that Russia deployed troops to its western borders for "combat training exercises" in response to NATO "military activities that threaten Russia".[224]Defender-Europe 21, one of the largestNATO-led military exercises in decades took place in Europe in May–June 2021, with preparations beginning in March. It included "nearly simultaneous operations across more than 30 training areas" inEstonia (which borders Russia),Bulgaria,Romania and other countries.[224][225]
On 6 October 2021, NATO expelled eight Russian diplomats, described as "undeclared intelligence officers", in response to suspected spying and assassinations. This halved the size of the Russian mission to NATO in Brussels to 10.[226] On 18 October, Russia suspended its mission to NATO and ordered the closure of NATO's office in Moscow in retaliation.[2]
In November 2021, Russian presidentVladimir Putin warned that he would not tolerate aNATO missile defense shield (to shoot down attacking missiles) ever being deployed in Ukraine. He said thatAegis Ashore interceptors, like those basedin Romania andPoland, could be secretly converted to launchTomahawk missiles that could reach Moscow within minutes. However, there were no such plans to deploy a missile shield in Ukraine.[227][228][229] The US Secretary of State,Antony Blinken, replied "it's Russia that has developed ground-launched, intermediate-range missiles that can reach Germany and nearly all NATO European territory, despite Russia being a party to theINF Treaty that prohibited these missiles". He added that "Russia's violation led to the termination of that treaty" by thefirst Trump administration.[230]
Putin asked U.S. PresidentJoe Biden for legal guarantees that NATO never let Ukraine join.[231] NATO Secretary-GeneralJens Stoltenberg replied that "It's only Ukraine and 30 NATO allies that decide when Ukraine is ready to join NATO. Russia has no veto, Russia has no say, and Russia has no right to establish a sphere of influence to try to control their neighbors".[232][233]
In December 2021, Russian sentan ultimatum to NATO, demanding the alliance end all activity in its Eastern European member states and ban Ukraine or anyformer Soviet state from ever joining, among other demands.[234] Some of the demands had already been ruled-out by NATO. A seniorBiden administration official said the US was willing to discuss the proposals, but added that there were some "that the Russians know are unacceptable".[234][235] Several Western political analysts suggested Russia was making unrealistic demands as a "smokescreen", knowing they would be rejected;[234] giving Russia a pretext for invading.[236] Others suggested that Putin was "aiming high to squeeze concessions" out of NATO.[237] Russia's Foreign MinisterSergei Lavrov warned "If there is no constructive response within a reasonable time and the West continues its aggressive line, then Russia will be forced to [...] eliminate unacceptable threats to our security".[238]

On 12 January 2022, the NATO-Russia Council met at NATO's HQ inBrussels for the last time, to discuss Russia'songoing military build-up on the Ukrainian border and Russia's demands. Present were NATO Secretary General, Jens Stoltenberg,U.S. Deputy Secretary of State,Wendy Sherman, Russian Deputy Foreign Minister,Alexander Grushko and Russian Deputy Defence Minister, Colonel GeneralAlexander Fomin.[239][240] Russian diplomatBoris Bondarev recounted a meeting with US officials in January 2022. He said that Russia's Deputy Foreign Minister,Sergei Ryabkov, shouted at American officials: "We need Ukraine! We won't go anywhere without Ukraine! Take all your stuff and go back to the 1997 [NATO] borders!". Bondarev later resigned over Russia's invasion.[241]
NATO replied to Russia's demands on 25 January. It said "Considering the substantial, unprovoked, unjustified, and ongoing Russian military build-up in and around Ukraine and in Belarus, we call on Russia to immediately de-escalate the situation".[242] NATO offered to improve communication and build trust with Russia, such as negotiating limits on missiles andmilitary exercises, as long as Russia withdrew troops from Ukraine's borders. The alliance rejected Russia's demand to keep Ukraine out of NATO forever, saying this would go against its "open-door policy" and the right of countries to choose their own security.[243] It pointed out that Russia had signed agreements affirming the right of Ukraine and other countries to join alliances.[242] The United States proposed an agreement whereby Russia and the US would not station missiles or troops in Ukraine. To address Russia's concerns about theNATO missile defense system, the US offered to let Russia inspect the bases to confirm they are not a threat.[242]
Russia did not withdraw troops. Despite Russia's announcement on 16 February 2022, that military training in Crimea had stopped and soldiers were returning to their posts, NATO Secretary-General Jens Stoltenberg said it appeared that Russia was continuing its military build-up.[244]
NATO replied to Russia's ultimatum in January 2022. It rejected some of Russia's demands but offered to negotiate others and to improve militarytransparency, as long as Russia stopped its military buildup around Ukraine. Putin replied that "Russia's fundamental concerns have been ignored".[245] In hisspeech on 21 February 2022, Putin again warned thatUkraine's membership of NATO would threaten Russia and that the alliance would use Ukraine to launch a surprise attack.[246] At the time, Ukraine had not applied for NATO membership and was a long way from potentially joining.[247] According to political scientistsMichael McFaul and Robert Person, Russia's occupation of Crimea and the Donbas had already blocked Ukraine's NATO membership; they suggested that Putin's real goal was "the end of [Ukraine's] democracy and the return of subjugation".[248]
The Russian government repeatedly denied it would attack Ukraine and accused NATO of "whipping up panic" and "hysteria".[249]

On 24 February 2022, during a meeting of theUnited Nations Security Council which was summoned to discuss the crisis, Putin ordered the Russian military to launch afull-scale invasion of Ukraine. It was the largest military attack on a European country since World War II, and further worsened relations between NATO and Russia. Inhis announcement, Putinfalsely claimed that NATO was building up its forces and military infrastructure in Ukraine, threatening Russia, and claimed the Ukrainian military was under NATO control.[250]
NATO issued a statement, saying:
We condemn in the strongest possible terms Russia's horrifying attack on Ukraine, which is entirely unjustified and unprovoked. ... This renewed attack is a grave violation of international law, including the UN Charter, and is wholly contradictory to Russia's commitments in theHelsinki Final Act, theCharter of Paris, theBudapest Memorandum and theNATO-Russia Founding Act. ... Throughoutthis crisis, NATO, the Allies, and our partners have made every effort to pursue diplomacy and dialogue with Russia and made many substantive proposals. We have repeatedly invited Russia to talks in the NATO-Russia Council. Russia has still not reciprocated. ... We will always maintain our full support for the territorial integrity and sovereignty of Ukraine ... We call on Russia to immediately cease its military action and withdraw all its forces. ... NATO will continue to take all necessary measures to ensure the security and defence of all Allies.[251]

Ukraine's government urged NATO to impose ano-fly zone over Ukraine to shield it from ongoing Russian bombing. On 4 March, NATO rejected a no-fly zone, because it could draw NATO into a direct conflict with Russia. Stoltenberg said "We have a responsibility as NATO allies to prevent this war from escalating beyond Ukraine, because that would be even more dangerous, more devastating". Instead, NATO statessent military aid and humanitarian aid to Ukraine.[252]
Because of the invasion, theNATO Response Force deployed troops in Poland, Estonia, Latvia, Lithuania, Slovakia, Hungary and Bulgaria.[253]
Russia's invasion also spurredFinland andSweden to announce plans to seek NATO membership. On 26 February 2022, Russia issued threats to Finland and Sweden in response.[254]On 16 May 2022, a day after the countries applied for membership, Putin said at a meeting ofCSTO:
Russia has no problems with these states [Sweden and Finland], and therefore in this sense the expansion [of NATO] at the expense of these countries does not create a direct threat [...] but the expansion of military infrastructure in this region will certainly cause our response.
— Vladimir Putin[255]
The2022 NATO Madrid summit declared Russia "a direct threat" to Euro–Atlantic security and approved an increase in the NATO Response Force to 300,000 troops.[4][256][257][258]
Multiple scholars and journalists speculated that the invasion of Ukraine likely marked the beginning of aSecond Cold War between NATO and Russia.[259][260] Peter Dickinson of theAtlantic Council suggested that "Russian dislike of NATO enlargement is real enough, but it has nothing to do with legitimate national security concerns. Instead, Putin objects to NATO because it prevents him from bullying Russia's neighbors".[261] An article published by theInstitute for the Study of War concluded:
Putin didn't invade Ukraine in 2022 because he feared NATO. He invaded because he believed that NATO was weak, that his efforts to regain control of Ukraine by other means had failed, and that installing a pro-Russian government in Kyiv would be safe and easy. His aim was not to defend Russia against some non-existent threat but rather to expand Russia's power, eradicate Ukraine's statehood, and destroy NATO.[262]

Since the beginning of the war, Russian officials and propagandists have increasingly said that they are "at war" with the whole of NATO, which the alliance has repeatedly denied.[7]Dmitry Medvedev, Putin's deputy on theSecurity Council of Russia, said in 2024 that "We must do everything so that Ukraine's 'irreversible path' to NATO ends with either the disappearance of Ukraine or the disappearance of NATO. Or even better - the disappearance of both".[263]
On 28 July 2024, Russian president Putin threatened to deploy long-range missiles that could hit all of Europe, after the US announced its intention to deploy long-range missiles in Germany from 2026.[264]
In October 2024, new NATO Secretary-GeneralMark Rutte emphasized the alliance's unwavering support for Ukraine during his visit to the Wiesbaden mission, which will oversee military aid coordination. He stated that NATO will not be intimidated by Russian threats and remains committed to Ukraine's defense.[265]
In April 2025, Russia'sforeign intelligence chief,Sergey Naryshkin, issued a threat that Russia would attack NATO countries in the event of NATO "aggression" against Russia or Belarus. He warned that Poland, Lithuania, Latvia and Estonia would be "the first to suffer".[266]
Since the invasion of Ukraine, there has been an increase inRussian hybrid warfare against NATO and other European countries, aimed at destabilizing the alliance and disrupting support to Ukraine. This has includedRussian sabotage operations in Europe, assassination plots,airspace violations,cyberattacks,electronic warfare, anddisinformation operations.[267][268]

There has been an increase in reported Russian Navy "spy ships" operating in the Baltic Sea, the North Sea, and the seas around Britain andIreland. Disguised as "research vessels", these ships are believed to be mapping critical undersea communications cables, electricity cables, energy pipelines and offshore wind farms. Some of them are escorted by Russian warships and are fitted with equipment for sabotaging undersea cables.[269][270] Russian-linked ships have been suspected ofcutting several undersea cables in the Baltic.[271]
In 2024, a number ofincendiary sabotage attacks were attributed to Russian special services that included posting incendiary bombs with delay fuzes to civilian courier services which resulted in fires in distribution centers in Germany and Britain.[272][273][274]
It was revealed in 2024 thatAmerican andGerman intelligence agents foiled a plan by the Russian government to assassinateArmin Papperger, CEO of German arms manufacturerRheinmetall AG.[275][276]
Viktor Orbán's government in Hungary has been accused of being the primary "GRU hub" in Europe, facilitating entry of Russian operatives into the EU and hosting an unusually large Russian diplomatic mission.[277] In October 2024 Poland'sInternal Security Agency (ABW) stated that there had been an increase in people charged with Russia-linkedsabotage and espionage.[278] In October 2024 a collective of investigative journalists, VSquare, published an article describing operations of the 390th Special Purpose Reconnaissance Point, a GRU sabotage unit targeted at NATO countries and based inKaliningrad.[279]

On 10 September 2025, at leasttwenty Russian drones flew into Poland's airspace, during an attack on Ukraine. Polish and NATO aircraft were scrambled, and shot down four of the drones, while the others crashed. Poland's prime ministerDonald Tusk called it "an act of aggression" by Russia and "the closest we have been to open conflict since World War II". In response, NATO launchedOperation Eastern Sentry to defend its eastern member states from Russian drone incursions. On 19 September, three Russian fighter jets violated Estonia's airspace before being escorted away by NATO jets. Between 22 and 28 September, there were numerousdrone sightings in Denmark and Norway over airports, military bases and critical infrastructure. Denmark's prime minister said that Russian involvement could not be ruled out. In response, NATO agreed to bolster its Baltic Sentry operation.[280][281][282][283]
This section needs to beupdated. Please help update this article to reflect recent events or newly available information.(January 2024) |

The idea of Russia becoming a NATO member has at times been floated by both Western and Russian leaders, as well as some experts.[284] In December 1991,Boris Yeltsin, President of Russia, sent a letter to NATO asking it to consider accepting Russia as a member of the alliance sometime in the future. Yeltsin wrote that this was a "long-term political goal" that "would contribute to an atmosphere of mutual understanding and trust and would strengthen stability and cooperation on the European continent".[285][286]
In 1993, US Secretary of State James Baker wrote anop-ed calling for NATO leaders to make a plan for including a "democratic Russia" in NATO, arguing that this could help Russian democrats and that Russia could have a "constructive role in European security" through NATO.[287]
On 14 January 1994, Russian president Boris Yeltsin said at a meeting with his American counterpartBill Clinton inNovo-Ogaryovo: "Russia has to be the first country to join NATO. Then the others from Central and Eastern Europe can come in". Yeltsin added however that Russia was not yet ready to join the alliance.[288][289][290][unreliable source?][non-primary source needed]
In the mid-1990s the Russian senior military representative at the NATO military headquarters, Colonel GeneralLeonty Shevtsov, was asked about the possibility of Russia joining NATO. He said it was unlikely in his view, because standardizing NATO and Russian equipment would be impractical. He added that "Russia is not one of these small central European countries with 15-20,000 personnel and 50 tanks, buying its equipment from other nations. Those countries NATO is capable of guiding, with advice and technical assistance, even re-equipping them. But Russia can provide its own equipment."[291]
Duringa series of interviews with filmmakerOliver Stone, PresidentVladimir Putin said that he suggested Russia joining NATO to PresidentBill Clinton when he visited Moscow in 2000.[292][293] Putin said in aBBC interview with David Frost just before his first inauguration as Russian president in 2000 that it was hard for him to see NATO as an enemy: "Russia is part of the European culture. And I cannot imagine my own country in isolation from Europe and what we often call the civilized world."[294] In 2000 Putin toldGeorge Robertson, Secretary General of NATO at the time, that he wanted Russia to join NATO but would not like to go through the usual application process.[295][296] According to former NATO Secretary GeneralAnders Fogh Rasmussen, in the early days of Putin's presidency around 2000–2001, Putin made many statements suggesting he was favorable to the idea of Russia joining NATO.[293]
On 5 March 2000, in response to a question about his attitude towards NATO, Putin said he could see a closer relationship between Russian and the alliance. "We believe we can talk about more profound integration with NATO, but only if Russia is regarded as an equal partner," he said. Asked if Russia might ever join NATO, he replied: "I do not see why not". Putin said attempts to exclude Russia from the debate over NATO's eastward enlargement had led Moscow to oppose such moves. When asked if he saw NATO as a potential partner, a rival or an enemy, Putin replied that the very question could "cause damage" and would "not do any good to Russia or the world".[297][298][299][300]
Putin, however, later abandoned the ideas ofEuropean integration andWestern democracy, turning instead to the "Eurasia Movement"[301] and "Putinism" as alternatives to theWestern andEuropean ideals espoused by many NATO countries.[302]
In response to a March 2009 suggestion byPolish foreign ministerRadosław Sikorski that Russia join NATO, the Russian envoy to NATO,Dmitry Rogozin, said that Russia had not ruled it out, but preferred to continue co-operation with NATO. He emphasized that "Great powers don't join coalitions, they create coalitions. Russia considers itself a great power". However, he said that Russia wanted to be NATO's "partner", provided that Ukraine and Georgia (which Russia hadinvaded the year before) did not join the alliance.[79] The suggestion of Russia joining NATO was repeated in an open letter co-written in early 2010 by some German defense experts. They posited that Russia was needed in an emerging multi-polar world in order for NATO to counterbalance emerging Asian powers.[303]


Anders Fogh Rasmussen said in 2019 that "Once Russia can show it is upholding democracy and human rights, NATO can seriously consider its membership."[293] In a 2019 interview withTime Magazine,Sergey Karaganov a close advisor to Putin, said that not inviting Russia to join NATO was "one of the worst mistakes in political history," arguing that it "put Russia and the West on a collision course, eventually sacrificing Ukraine".[305]
Kimberly Marten argued in 2020 that NATO's enlargement made it weaker, not stronger. The bad relations that emerged after 2009 were mostly caused by Russian reaction to its declining influence in world affairs. Russia's strong negative reaction was manipulated and magnified by both Russian nationalists and by Putin, as ammunition in their domestic political battles.[306][307] Marten believes the Russian leaderships' views of world politics "are deeply rooted inrealist approaches tointernational relations" and she says they perceive "a major external military risk in NATO's bringing the military infrastructure of its member countries near the borders of the Russian Federation; likewise, with further [formal] expansion of the Alliance."[308] This, she says, provides a threat-based legitimacy that allows Russian leaders to consolidate their domestic position, implement harsh anti-democratic measures, and justify a military build-up and aggressive actions abroad.[308]
Russia periodically blocked navigation via theStrait of Baltiysk in the 1990s. Since 2006 it has imposed a continuous blockade (both for Poland and the Russian Kaliningrad Oblast), despite entering in 2009 an international agreement concerning this matter.[309] As a result, Poland started to consider digging another canal across the Vistula Spit in order to circumvent this restriction,[310] and ultimately built theVistula Spit canal in 2019–2022.
TheRussian economy is heavily dependent on the export of natural resources such as oil and natural gas, and Russia has used these resources to its advantage.Russia and the western countries signed in 1991 theEnergy Charter Treaty establishing a multilateral framework for cross-border cooperation in theenergy industry, principally thefossil fuel industry; Russia, however, postponed its ratification, linking it to the adoption of the Energy Charter Treaty Transit Protocol. Starting in 2005, Russia and Ukraine had severaldisputes in which Russia threatened to cut off the supply of gas. As a great deal of Russia's gas is exported to Europe through the pipelines crossing Ukraine, those disputes affected several NATO countries. While Russia claimed the disputes had arisen from Ukraine's failure to pay its bills, Russia may also have been motivated by adesire to punish the pro-Western government that came to power after theOrange Revolution.[311] In December 2006, Russia indicated that the ratification of the Energy Charter Treaty was unlikely due to the provisions requiring third-party access to Russia's pipelines.[312] On 20 August 2009, Russia officially informed the depository of the Energy Charter Treaty (theGovernment of Portugal) that it did not intend to become a contracting party to the treaty.[313] Russian gas exports came to be viewed as a weapon against NATO countries,[314] and the US and other Western countries have worked to lessen the dependency of Europe on Russia and its resources.[315]
In 1998, Russia joined theG8, a forum of eight largedeveloped countries, six of which are members of NATO, until being expelled in 2014. In 2012, Russia joined theWorld Trade Organization, an organization of governments committed to reducingtariffs and othertrade barriers. These increased economic ties gave Russia access to new markets and capital, as well as political clout in the West and other countries. While Russia's new role in the global economy presented Russia with several opportunities, it also made the Russian Federation more vulnerable to external economic trends and pressures. Like many other countries, Russia'seconomy suffered during theGreat Recession.[316]
Following itsannexation of Crimea, several countries (including most of NATO) imposedsanctions on Russia, hurting the Russian economy by cutting off access to capital. As a further consequence, Russia has also been expelled from theG8.[317] At the same time, the globalprice of oil declined.[318] The combination ofinternational sanctions and the falling crude price in 2014 and thereafter resulted in the2014–16 Russian financial crisis.[318] Following the2022 Russian invasion of Ukraine, NATO members imposed further sanctions against Russia. Russia retaliated by placing member states of NATO (except Turkey) on alist of "unfriendly countries" along with other Western states.
I firmly believe that our cooperation at SHAPE and in Bosnia was instrumental in the creation of the NATO-Russia Founding Act, which was signed in May 1997 in Paris. As NATO's Deputy Secretary General said, 'Political reality is finally catching up with the progress you at SHAPE had already made.'