3rd Division (Australia)

3rd Division
3rd Division troops around Lena Wood, 8 August 1918
Active	1916–1919 1921–1946 1948–1991
Country	Australia
Branch	Australian Army
Type	Infantry
Size	~13,000 to 18,000 personnel
Part of	II ANZAC Corps (1916–1917) Australian Corps (1917–1919) I Corps (1942–1944) II Corps (1944–1945)
Engagements	World War I Western Front World War II New Guinea campaign Salamaua–Lae campaign Bougainville campaign.
Commanders
Notable commanders	John Monash John Gellibrand Harold Edward Elliott Thomas Blamey Stanley Savige William Bridgeford George Wootten
Insignia
Unit colour patch

The 3rd Division was an infantry division of the Australian Army. Existing during various periods between 1916 and 1991, it is considered the "longest serving Australian Army division".^[1] It was first formed during World War I, as an infantry division of the Australian Imperial Force and saw service on the Western Front in France and Belgium. During this time it fought major battles at Messines, Broodseinde Ridge, Passchendaele, Amiens, and the St Quentin Canal.

The division was demobilised in 1919 before being re-raised in 1921 as part of the Citizen Forces, based in central Victoria. Throughout the 1920s and 1930s, the division's establishment fluctuated due to the effects of the Great Depression and a general apathy towards military matters.

During World War II, the division was mobilised for war in December 1941 and initially undertook defensive duties in Australia before being deployed to New Guinea in 1943 where they took part in the Salamaua–Lae campaign against the Japanese in 1943–1944, before returning to Australia for rest and reorganisation. In late 1944 they were sent to Bougainville to take part in the Bougainville campaign the final campaign of the war. There they undertook a series of advances across the island before the war came to an end in August 1945.

Following the end of hostilities the division was disbanded in December 1945 as part of the demobilisation process, but was it later re-raised in 1948 as part of the Citizens Military Force. It subsequently served through the Cold War as a reserve formation until 1991 when the division was disbanded for a final time as the Australian Army was restructured and the focus of Australian field force operations shifted from the divisions to brigades.