Australia in the Vietnam War. Just came across this Government website. Great info, fantastic photos. A really top notch professional website. Australia and the Vietnam War The Vietnam War was the longest major conflict in which Australians have been involved; it lasted ten years, from 1962 to 1972, and involved some 60,000 personnel. A limited initial commitment of just 30 military advisers grew to include a battalion in 1965 and finally, in 1966, a task force. Each of the three services was involved, but the dominant role was played by the Army. In the early years Australia’s participation in the war was not widely opposed. But as the commitment grew, as conscripts began to make up a large percentage of those being deployed and killed, and as the public increasingly came to believe that the war was being lost, opposition grew until, in the early 1970s, more than 200,000 people marched in the streets of Australia’s major cities in protest.