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 South Korea after leaving Australia. The magnitude of the ceremonial welcome accorded to Diem was unseen since the visit in 1954 by Queen Elizabeth II. According to Peter Edwards, a military historian at the Australian War Memorial specialising in the Vietnam War, "Everywhere he was feted as a man of courage, faith and vision", and he noted that Diem was received with "more ceremony and pageantry" than the visit of Queen Elizabeth II in 1954. Diem travelled with five others, including the Minister for Public Works and Communications, the Health Minister, and the Permanent Secretary-General of the Department for National