The 2/2nd Machine Gun Battalion was an infantry support unit of the all-volunteer Second Australian Imperial Force that was raised for service overseas during the Second World War. Formed in mid-1940 in Sydney, from personnel drawn from the states of Queensland and New South Wales, the battalion was allocated to the Australian 9th Division. After completing training in Australia, the battalion operated in the Middle East between early 1941 and early 1943, seeing action against German and Italian forces at the First and Second Battles of El Alamein, and undertaking garrison duties in Syria as part of the Allied garrison that was established there after the Syria–Lebanon campaign.

The Huon Peninsula campaign was a series of battles fought in north-eastern Papua New Guinea in 1943–1944 during the Second World War. The campaign formed the initial part of an offensive that the Allies launched in the Pacific in late 1943 and resulted in the Japanese being pushed north from Lae to Sio on the northern coast of New Guinea over the course of a four-month period. For the Australians, a significant advantage was gained through the technological edge that Allied industry had achieved over the Japanese by this phase of the war, while the Japanese were hampered by a lack of supplies and reinforcements due to Allied interdiction efforts at sea and in the air.