Prime Minister of Australia prime minister, otherwise William McMahon63. Robert Menzies was the oldest person to ever be prime minister, leaving office at 71 years old. The longest-serving Prime Minister was Sir Robert Menzies, who served in office twice: from 26 April 1939 to 28 August 1941, and again from 19 December 1949 to 26 January 1966. In total Robert Menzies spent 18 years, 5 months and 12 days in office. He served under the United Australia Party and the Liberal Party respectively. The shortest-serving Prime Minister was Frank Forde, who was appointed to the position on 6 July 1945 after the death of
Prime Minister of Assam India movement. Saadulla was invited to form two ministries in 17 November 1939 and 24 August 1942, with intervening periods of Governor's rule in between. Saadulla served as Prime Minister for a total of 9 years. Bordoloi was released in 1944. During the Indian provincial elections, 1946, the Congress led by Bordoloi received a majority and formed government once again. On 6 July 1947, the Sylhet referendum voted for the partition of Muslim-majority Sylhet district from Assam; and merger with East Bengal. Bordoloi later became the first Chief Minister of Assam after Indian independence in 1947. Prime Minister of Assam