The 2/2nd Pioneer Battalion was one of four pioneer battalions raised as part of the Second Australian Imperial Force during World War II. Raised in 1940, the battalion served in the Middle East during the Syria–Lebanon Campaign against the Vichy French in mid-1941, fighting mainly as infantry. In 1942, the battalion was committed to the defence of Java, fighting against the Japanese and was all but destroyed following the capitulation of the defending garrison. Rebuilt in 1943, it later took part in the Salamaua–Lae and Finisterre Range campaigns in 1943–44 and the Borneo campaign in 1945 before being disbanded.