Europe and Asia would go communist in rapid succession. As Australia is an anticommunist country, the thought of change was a reason for Australia's involvement in the war.
Australia’s further involvement in the Vietnam war can be attributed to their belief in the theory of the Domino effect. The domino effect was a foreign policy which speculated that if one country falls under communism then the surrounding countries would follow in a Domino effect, as already Russias web of power was spreading to South east Asia. This popular analogy was exposed by the media through propaganda posters. This was a drive for young Australian men to fall as a victim to conscription to stop communism in its tracks in Vietnam.
Amidst Australia’s growing struggles over communism, their alliance with the US was a reassuring symbol of a uniquely powerful protector. After World War II Australia still relied on Britain to come to our aid in the event of an attack, but formed a close bond with their new best friend America. After World war II in order for the US to protect our country Australia built an American naval base to attack the invading countries. This was fulfilled to publicize Australia's loyalty to America. Australia had a formal alliance with the US, this is known as the ANZUS Treaty. This treaty concluded in 1951. This agreement meant that Australia, the US and New Zealand would come to each other's aid in the event of an attack. This agreement was one of the reasons why Australia was involved in the war, as it made them feel like they were “under the US’ wing” meaning they were looked after by the US, spoken by Prime Minister Robert Menzies.