Billy McMahon was an Australian politician who served as the 18th Prime Minister of Australia from 1971 to 1972. He was a member of the Liberal Party of Australia and represented the Higgins electorate in the House of Representatives. McMahon's tenure was marked by economic challenges and a focus on international relations. Before becoming Prime Minister, McMahon held various ministerial positions, including Minister for Defence and Treasurer. His leadership style was often described as pragmatic, and he aimed to strengthen Australia's ties with the United States and Asia. After losing the 1972 election, he retired from politics and remained active in public life.