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Borneo campaign (1945)
|Borneo campaign (1945)|
|Part of World War II|
A map showing the progress of the Borneo campaign
|Commanders and leaders|
| Douglas MacArthur
| Michiaki Kamada
|Casualties and losses|
|2,100 casualties||4,700 casualties|
The Borneo campaign of 1945 was the last major Allied campaign in the South West Pacific Area during World War II to liberate the-Japanese held British Borneo and Dutch Borneo. In a series of amphibious assaults between 1 May and 21 July, the Australian I Corps, under Lieutenant General Leslie Morshead, attacked Imperial Japanese forces occupying the island. Allied naval and air forces, centred on the U.S. 7th Fleet under Admiral Thomas Kinkaid, the Australian First Tactical Air Force and the U.S. Thirteenth Air Force also played important roles in the campaign. They were resisted by Imperial Japanese Navy and Army forces in southern and eastern Borneo, under Vice-Admiral Michiaki Kamada, and in the north west by the Thirty-Seventh Army, led by Lieutenant-General Masao Baba.
The plans for the Allied attacks were known collectively as Operation Oboe. The invasion of Borneo was the second stage of Operation Montclair, which was aimed at destroying Imperial Japanese forces in, and re-occupying the Dutch East Indies, Kingdom of Sarawak, Brunei, Labuan, British North Borneo and the southern Philippines. Borneo in particular was considered at the time a strategic location for its natural resource; oil and rubber. The Borneo campaign was criticised in Australia at the time and in subsequent years, as pointless or a "waste" of the lives of soldiers especially following the first operation in Tarakan. Modern historians such as Max Hastings have said that attacking these forces, already cut off from Japan, was a waste of resources.
"Any rational strategic judgment would have left them to their own devices screened by token allied forces until their nation's defeat enforced their surrender".
It has been argued that the campaign did, however, achieve a number of objectives, such as increasing the isolation of significant Japanese forces occupying the main part of the Dutch East Indies, capturing major oil supplies, and freeing Allied prisoners of war, who were being held in increasingly worse conditions in the Sandakan camp and Batu Lintang camp. The initial Allied plan comprised six stages: Operation Oboe 1 was to be an attack on Tarakan; Oboe 2 against Balikpapan; Oboe 3 against Banjarmasin; Oboe 4 against Surabaya or Batavia (Jakarta); Oboe 5 against the eastern Netherlands East Indies; and Oboe 6 against British North Borneo (Sabah). In the end only the operations against Tarakan, Balikpapan and British Borneo—at Labuan and Brunei Bay—took place. The campaign opened with Oboe 1 by a landing on the small island of Tarakan, off the north east coast on 1 May 1945 using Australian built MKIII folboats. Small parties paddled in the Tarakan region to obtain useful information and observe the Djoeta oilfields prior to an invasion. On 29 May 1945, The Oboe 6 party, including Sergeant J Wong Sue, was inserted into Kimanis Bay, British North Borneo for close reconnoitreing work using a Hoehn military folboat deployed from a Catalina aircraft.
On 10 June 1945, Oboe 6 subsequently followed with simultaneous assaults on the island of Labuan and the coast of Brunei in the north west of Borneo. A week later, the Australians followed up with attacks on Japanese positions around Weston on the north-eastern part of Brunei Bay. The attention of the Allies then switched back to the central east coast, with Oboe 2. The last major amphibious assault of World War II was at Balikpapan on 1 July 1945. These operations ultimately constituted the last campaigns of Australian forces in the war against Japan.
- 1 May – 21 June 1945: Battle of Tarakan (Oboe One)
- 10 June – 15 August 1945: Battle of North Borneo and Battle of Labuan (Oboe Six)
- 1–21 July 1945: Battle of Balikpapan (Oboe Two)
- Ooi 2010, p. 204.
- Dean 2018.
- Australian War Memorial London.
- Asagumo Shimbunsha 1966.
- Dean 2015, p. 279.
- Sandler 2001, p. 180.
- Hastings 2007, p. 368.
- Tanaka 2017, p. 27.
- Mikaberidze 2018, p. 27.
- Dennis 1995, p. 440.
- Converse 2011, p. 17.
- Hoehn 2011, p. 71.
- Australian War Memorial 1968, p. 644.
- Pfennigwerth 2009, p. 166.
- Long 1963, p. 49.
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