Australia's involvement in the Vietnam War began with a small commitment of 30 military advisors in 1962, and increased over the following decade to a peak of 7,672 Australian personnel following the Menzies Government's April 1965 decision to upgrade its military commitment to South Vietnam's security. By the time the last Australian personnel were withdrawn in 1972, the Vietnam War had become Australia's longest war, eventually being surpassed by Australia's long-term commitment to the War in Afghanistan. It remains Australia's largest force contribution to a foreign conflict since the Second World War, and was also the most controversial military action in Australia since the conscription controversy during World War I. Although initially enjoying broad support due to concerns about the spread of communism in Southeast Asia, an increasingly influential anti-war movement developed, particularly in response to the government's imposition of conscription.

The 8th Battalion, Royal Australian Regiment was an Australian Army Regular infantry battalion. The battalion was formed in July 1966 as part of an expansion of the Australian Army in the mid-1960s due to the perceived threat of Communism in southeast Asia. Initially the battalion was sent to Malaysia in 1967, before later being sent to South Vietnam as part of Australia's commitment to the Vietnam War. Between November 1969 and October 1970 the battalion undertook operations as part of the 1st Australian Task Force, before being brought back to Australia. In October 1973, after Australia's involvement in Vietnam officially ended, the battalion was amalgamated with 9 RAR to form 8/9 RAR.