There are many reasons why Australia was involved in the Vietnam War. Some of these reasons are that Australia had a forward defense policy, because of the ANZUS and the SEATO treaties, the perception that Australians thought that the communists were evil, the spread of communism in Southeast Asia, the Menzies government believed in the domino theory and the government claimed a free country was under attack.

The forward defense policy meant that troops were sent overseas to fight the enemy before they reached Australia. The forward defense policy was a part of the SEATO and ANZUS treaties (SEATO stands for the South-East Asian Treaty Organization and ANZUS stands for the Australian, New Zealand and United States treaties).

Also a major reason why Australia was involved in Vietnam was because the Australian public and government perceived the communists as an evil force in the world. The Australian government...