The Australian Government responded to the threat of communism in Asia including forward defence, the ANZUS Treaty and the SEATO Alliance. Within Australia, the responses included a referendum to ban Communist Party and the Petrov Affair.
Forward Defence was a foreign policy used by the Australian Government in response to the threat of communism. The Korean War (1950-1953) and the Vietnam War (1962-1972) were part of the forward defence tactic which was to keep aggressive communism as far from Australia as possible. Both wars were considered evidence of the domino theory. Australia joined the wars to stop communism from spreading