The 36th Battalion was an infantry battalion of the Australian Army. It was originally raised in 1916 as part of the First Australian Imperial Force during World War I. Throughout World War I the battalion served on the Western Front as part of the 9th Brigade, attached to the 3rd Division. Due to heavy casualties amongst the AIF and a decrease in the number of replacements arriving from Australia in 1918, the battalion was disbanded before the war ended in order to reinforce other units in France. The 36th Battalion was re-raised in 1921 as part of the Militia based in Sydney. During World War II the battalion was attached to the 14th Brigade and was initially used in a defensive role as a garrison unit in Australia before being sent to New Guinea in 1942. Throughout the course of the war