List of Australian divisions in WWII

The following is a list of Australian divisions in World War II, including all divisions raised within the Australian Army during World War II. A total of 15 such formations were established by the Army during the war; of these four infantry divisions served as part of the Second Australian Imperial Force, along with one armoured division. Two other armoured divisions were formed as part of the Militia, as well as eight other infantry divisions. The 2nd AIF formations provided the bulk of Australia's deployed forces, while many of the Militia formations were employed mainly for home defence and many were only partially formed before being broken up without seeing combat. Nevertheless, two Militia divisions were deployed as formed units, and elements of several others also fought overseas during the war.

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A total of five divisions were raised as part of the all volunteer Second Australian Imperial Force (2nd AIF), and this formed the bulk of Australia's deployed ground force during the war. Of these, the four infantry divisions – the 6th, 7th, 8th, and 9th – were the only 2nd AIF divisions to be fully formed and see active service. The 6th went into action first, fighting its first battle at Bardia in January 1941, and it was subsequently joined in the Middle East by the 7th and 9th Divisions, who fought several campaigns in North Africa, Greece, Syria and Lebanon. While the 8th Division was largely destroyed in early 1942 during fighting against the Japanese in Malaya and Singapore, and in the islands to Australia's north, the other three infantry divisions fought throughout the war, eventually returning from the Middle East and fighting against the Japanese in the Pacific during the New Guinea and Borneo Campaigns. Initially, it had been planned to deploy the tank-equipped 1st Armoured Division to the Middle East also, but concerns about a Japanese invasion meant that they were retained in Australia for continental defence. Elements of the division did eventually see action in the Pacific against the Japanese, but only after being transferred from the division to other formations such as the 4th Armoured Brigade. Late in the war it was planned to form another infantry division within the 2nd AIF as Australia's contribution to the proposed invasion of Japan. This formation was to be designated the 10th Division – which previously existed briefly as a Militia formation in 1942 – and was to be formed using volunteers from the three remaining 2nd AIF infantry divisions, which would have been broken up, but the war ended before the division was re-established.

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