Origins of the Cold War
Australia's entry into the Cold War came in 1950, when it rushed combat air and sea forces into the Korean War, two days after the Americans did. The Australian Prime Minister received a hero's welcome in Washington. The ANZUS military alliance with New Zealand and the United States was signed in July 1951; it was a plan for consultation and did not involve military planning like NATO. Public opinion in Australia was intensely hostile to Japan after its wartime atrocities, but Japan was now an ally in the Cold War, so Australia's accepted the very generous soft peace treaty with Japan in 1951. Instead of worrying about a resurgent Japan, Australia now worried more about a possible Chinese threat.
Foreign relations of Australia
Australia sent troops to repel communism and assist South Vietnamese and American forces in the Vietnam War, in a move that stirred up antiwar activism at home. It joined coalition forces in the Persian Gulf War in 1991. Australia has been active in the Australia – New Zealand – United Kingdom agreement and the Five Power Defence Arrangement—successive arrangements with Britain and New Zealand to ensure the security of Singapore and Malaysia.