Australia–United States relations Minister for Defence, US Secretary of Defense and US Secretary of State. The first Australian visit by a serving United States President was that of Lyndon B. Johnson in 1966 to seek support for Australia's ongoing involvement in the Vietnam War. Australia had previously sent advisers and combat troops to Vietnam. In 1992, George H. W. Bush was the first of four US presidents to address a joint meeting of the Australian Parliament. Australia's Prime Minister, Kevin Rudd, ratified the Kyoto Protocol on 3 December 2007, leaving the United States and Canada as the last major industrial nations not to
Ngo Dinh Diem presidential visit to Australia in the midst of the Cold War. He refused to hold the national elections and asserted that Ho Chi Minh would rig the ballots in the north, although he had done so himself in deposing Bảo Đại. Diem arrived in the capital Canberra on 2 September 1957; his visit was the first by a foreign incumbent head of state to Australia. He had visited the US in May, and the visit to Australia was the second of three legs in a tour of anti-communist countries in the Asia Pacific region; Diem had visited Thailand in August and went on to