Australia in the Korean War
No. 77 Squadron converted to P-51D Mustang fighters before arriving in Japan in February 1946 to participate in the British Commonwealth Occupation Force. Occupation duties proved uneventful, and No. 77 Squadron was preparing to leave Japan for Australia when the Korean War broke out in June 1950. 77 Sqn was immediately dispatched to Korea, where they became the first UN air unit to enter the war, primarily in ground support, combat air patrol, and escort missions.
Australian Army during World War II
Australia entered World War II on 3 September 1939. On 14 September Prime Minister Robert Menzies announced that 40,000 members of the Militia would be called up for training and a 20,000-strong expeditionary force, designated the Second Australian Imperial Force, would be formed for overseas service. Like its predecessor, the Second AIF was a volunteer force formed by establishing entirely new units. In many cases these units drew their recruits from the same geographical areas as First AIF units, and they were given the same numerical designations albeit with the prefix "2/".