Seven Mile Aerodrome was originally built in 1940 by the Australian Department of Defence and was used primarily by the Royal Australian Air Force and the United States Air Force, to bring troops and supplies into the area. The airport became the main transit base for RAAF transport planes during World War II. Several civilian aircraft were permitted at the airport, but during the war its primary purpose was military as a refuelling and staging facility, as the airport was strategically located near the Pacific Theater of Operations. No. 57 Operational Base Unit (RAAF) ran and maintained the aerodrome.