| Dutch East Indies campaign | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Part of thePacific Theatre ofWorld War II | |||||||||
 Japanese forces land on Java. | |||||||||
| |||||||||
| Belligerents | |||||||||
 Portuguese Timor |  Japan | ||||||||
| Commanders and leaders | |||||||||
 Archibald Wavell A. T. van Starkenborgh  Hein ter Poorten  Thomas C. HartConrad HelfrichKarel Doorman †Richard PeirseGeorge Brett |  Hisaichi TerauchiKiyotake Kawaguchi Ibō TakahashiHitoshi ImamuraShōji NishimuraJisaburō OzawaTakeo TakagiNobutake Kondō | ||||||||
| Strength | |||||||||
148,000[2] 33 warships[5]41 submarines[6] 234 aircraft[3] | 52 warships[7][8] 18 submarines[6] 107,800 personnel 193 tanks & tankettes 2,017 guns & mortars 5,898 motor vehicles 11,750 horses 609 aircraft[9] | ||||||||
| Casualties and losses | |||||||||
2,384 killed 1 seaplane tender 2 heavy cruisers 3 light cruisers 1 coastal defense ship 15 destroyers 1 oil tanker 1 gunboat 5,000–10,000 sailors and Marines killed on the sunken ships thousands of sailors and Marines captured[11] | 671 killed[12] | ||||||||
TheDutch East Indies campaign of 1941–1942 was the conquest of theDutch East Indies (present-dayIndonesia) by forces of theEmpire of Japan in the early days of thePacific campaign ofWorld War II.Allied forces attempted unsuccessfully to defend the islands. The East Indies were targeted by the Japanese for their rich oil resources which would become a vital asset during the war. The campaign and subsequent three-and-a-half-yearJapanese occupation was also a major factor in the end ofDutch colonial rule in the region.
The East Indies was one of Japan's primary targets if and when it went to war because the colony possessed abundant valuable resources, the most important of which were its rubber plantations and oil fields;[13][14] the colony was the fourth-largest exporter of oil in the world, behind the U.S.,Iran, andRomania.[14][15] The oil made the islands enormously important to the Japanese, so they sought to secure the supply for themselves. They sent fourfleet carriers (Akagi,Kaga,Hiryū, andSōryū) and alight carrier along with the fourfast battleships of theKongō class, 13heavy cruisers, and manylight cruisers anddestroyers to support theiramphibious assaults in addition to conducting raids on cities, naval units and shipping in both that area and around the Indian Ocean.[16]
Access to oil was the main goal of the Japanese war effort, as Japan lacked native source of oil;[17] it could not produce enough to meet even 10% of its needs,[14] even with the extraction ofoil shale inManchuria using theFushun process.[18] Japan quickly lost 93% of its oil supply after PresidentFranklin D. Roosevelt issued an executive order on 26 July 1941 which froze all of Japan's U.S. assets andembargoed all oil exports to Japan.[19] In addition, theDutch government-in-exile, at the urging of theAllies and with the support ofQueen Wilhelmina, broke its economic treaty with Japan and joined the embargo in August.[17] Japan's military and economic reserves included only a year and a half's worth of oil.[14] As a U.S. declaration of war against Japan was feared if the latter took the East Indies, the Japanese planned to eliminate theU.S. Pacific Fleet, allowing them to take over the islands; this led to theattack on Pearl Harbor.[20][21]
In late November, the Netherlands government in the East Indies under the Dutch government-in-exile (already at war with Imperial Japan'sAxis power allyGermany in Europe) began preparing for war against Japan itself: ships of theRoyal Netherlands Navy were sent to sea and theKNIL Air Force was mobilised.[22] On 4 December, three days after having decided on a policy of war against America, Britain and the Netherlands, the Japanese government decided instead to "treat the Netherlands as a quasi enemy until actual hostilities ... occur."[23][24] This was in the hope that the Dutch would not preemptively destroy oil installations before the Japanese were ready to invade.[23]
On 8 December 1941, in a public proclamation, the Netherlands declared war on Japan.[25] By 07:00 on the day of the attack, the East Indies government had warned merchantmen at sea to make for the nearest port. At that hour, the governor general made a public announcement over the radio that the Netherlands "accepts the challenge and takes up arms against the Japanese Empire."[22] Instructions had been telegraphed to the embassy in Tokyo at 02:30, even before news of the attack on Pearl Harbor had reached the Dutch government in London at 04:00. The instructions were only received on the evening of the next day, and the declaration of war was finally handed to the Japanese foreign minister,Shigenori Tōgō, by the Dutch ambassador, J. C. Pabst, on the morning of 10 December.[22] The Swedish ambassador agreed to handle Dutch interests for the duration of the conflict.
The Dutch declaration did not alter the Japanese decision, and the latter's declaration of war did not come until 11 January 1942.[23] When Japan was charged with waging a "war of aggression" before theInternational Military Tribunal for the Far East in 1946, it was argued that her attitude towards the Netherlands proved otherwise, since the Dutch had declared war first. The tribunal rejected this, on the grounds that Japan's sole intention was "to give less time to the Netherlands for destroying oil wells."[23] They found that the Netherlands' declaration was in self-defence.[24]
GeneralHisaichi Terauchi, commander of theSouthern Expeditionary Army Group, began the campaign by sending the16th Army under command of GeneralHitoshi Imamura to attackBorneo. On 17 December 1941 Japanese forces landed atMiri, an oil production centre in northernSarawak, with support from a battleship, an aircraft carrier, three cruisers and four destroyers.[26]
Initially, the Japanese launched air strikes on key areas and gainedair superiority. Following the air strikes, landings were made at several locations, targeting airfields and other important points in the area. In addition to the landing at Miri, forces made landings atSeria,Kuching,Jesselton andSandakan between 15 December 1941 and 19 January 1942. After these main objectives in Borneo were achieved, the Japanese planned a three-pronged assault southward using three forces named Eastern Force,Center Force and Western Force. The goal was to capture the oil resources of the East Indies. The Eastern Force was to advance fromJolo andDavao and move on to captureCelebes,Amboina andTimor, while protecting the Center Force's flank. The Center Force was to capture oil fields and airfields inTarakan Island andBalikpapan. Both these forces would support the Western Force, which was to attack and capture the oil refineries and airfields inPalembang. The Japanese launched their assault on 11 January and landed at Tarakan.[27]
To coordinate the fight against the Japanese, the American, British, Dutch, and Australian forces combined all available land and sea forces under theAmerican-British-Dutch-Australian Command (ABDACOM or ABDA) banner. This command was activated on 15 January 1942, commanded by British field marshal SirArchibald Wavell.[28] The command structure had the AmericanArmy Air Force lieutenant generalGeorge Brett as deputy commander, the British lieutenant generalHenry Royds Pownall as chief of staff; under them were the American admiralThomas C. Hart as naval commander, the Dutch lieutenant generalHein ter Poorten as ground forces commander, and the British air chief marshal SirRichard Peirse as the air commander.[29] Although the forces were combined, they had differing priorities: the British believed the defense of the territory of Singapore and the eastern entrances to the Indian Ocean (the route toBritish Ceylon andBritish India) to be paramount; the Americans and Australians did not want a total penetration of Southeast Asia that would deprive them of bases necessary for any serious counterattack; and the Dutch considered Java and Sumatra, their "second homeland where [they] had been trading and living for over three centuries", to be the most important place to defend.[30]
Even the combined forces could not stop or even slow the Japanese advance because of their much greater numbers; to face the attacking naval forces, the ABDA command had a conglomerate of ships drawn from any available units, which included theU.S. Asiatic Fleet (fresh from thefall of the Philippines), a few British and Australian surface ships, and Dutch units that had previously been stationed in the East Indies. Major forces included twoseaplane tenders (USS Langley andChilds), two heavy cruisers (USS Houston andHMS Exeter), seven light cruisers (HNLMS De Ruyter,Java andTromp,USS Marblehead andBoise [thoughBoise was forced to leave the area after striking a shoal on January 21],HMAS Hobart andPerth), 22 destroyers, and, perhaps their greatest strength, 25 American and 16 Dutch submarines. Being based on Java, these ships had to take on the central and western prongs of the three-headed Japanese assault.
The Central Force's combat ships included the light carrierRyūjō, the seaplane tendersSanyo Maru andSanuki Maru, three light cruisers, and 16 destroyers, while the Western Force contained five heavy cruisers and seven destroyers. In addition, four Japanese fleet carriers (Akagi,Kaga,Hiryū andSōryū) and the fourKongō-class battleships were in the theater of operation.[8]
The manner of the Japanese advance resembled the insidious yet irresistible clutching of multiple tentacles. Like some vast octopus it relied on strangling many small points rather than concentration on a vital organ. No one arm attempted to meet the entire strength of the ABDA fleet. Each fastened on a small portion of the enemy and, by crippling him locally, finished by killing the entire animal. [...] The Japanese spread their tentacles cautiously, never extending beyond the range of land-based aircraft unless they had carrier support. The distance of each advance was determined by the radius of fighter planes under their control. This range was generally less than 400 miles, but the Japanese made these short hops in surprisingly rapid succession. Amphibious operations, preceded by air strikes and covered by air power developed with terrifying regularity. Before the Allies had consolidated a new position, they were confronted with a system of air bases from which enemy aircraft operated on their front, flanks and even rear.[31]
The Japanese were using Tarakan airfield as a forward airbase by 17 January, and Balikpapan was captured a week later. However, the Dutch garrisons had destroyed the oil fields before they were captured by the Japanese in both cases. Several Japanese vessels were destroyed or damaged by Allied naval and air counterattacks, but the defending Dutch battalions were overrun. By 28 January, the Japanese had taken control of the airfields at Balikpapan, and their aircraft were operating from them.[27] By the end of January, Japanese forces had captured parts of the Celebes and Dutch Borneo,[32] and by February they had landed onSumatra and encouraged a revolt inAceh.[32]
Most of the naval components of the Allied forces were crushed in the battles ofJava Sea,Sunda Strait andSecond Java Sea;[17][33] the only American ship larger than a destroyer to survive the battles was the old cruiserMarblehead.[34] In addition, the land forces on the islands were quickly overwhelmed, and most major resistance was overcome within two months of the initial assaults, although aguerrilla campaign in Timor was successfully waged for a time.[17][33] The ABDA command was dissolved 1 March, less than two months after its inception, by AdmiralConrad Helfrich.[35]
On 8 March 1942 the Dutch surrendered without condition to Japan in Kalijati,Subang,West Java. This is also known as the Kalijati treaty.[36] On 9 March the Dutch Commander-in-Chief of Allied forces on Java, Lieutenant GeneralHein ter Poorten, surrendered along with Governor GeneralJonkheerA.W.L. Tjarda van Starkenborgh Stachouwer. Ter Poorten's surrender announcement was made without consulting the commanders of the British and US forces, who wanted to continue fighting but who had no choice but to comply with the surrender.[37][38]
The military power of the Netherlands Indies was never calculated to wage war single-handed against the Japanese empire. For such purposes it is, to begin with, entirely inadequate... Our troops have suffered heavy losses, because of the impossibility of protecting them against the enemy's air attacks; they are exhausted... May God be with us. Long live the queen!
Allied forces did not attempt to retake the islands of Java, Sumatra, Timor, or Bali during the war. Japanese forces on those islandssurrendered at the conclusion of World War II. Most of the Japanese military personnel and civilian colonial administrators were repatriated to Japan following the war, except for several hundred who were detained for investigations ofwar crimes, for which some were later put on trial. About 1,000 Japanese soldiers deserted from their units and assimilated into local communities. Many of these soldiers provided assistance to Indonesian Republican forces during theIndonesian National Revolution.[40]
