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
United Kingdom declaration of war on Japan it costs nothing to be polite." Winston S. Churchill: The Second World War (vol.3): the Grand Alliance. (1950) United Kingdom declaration of war on Japan On 8 December 1941, the government of the United Kingdom declared war on the Empire of Japan, following the Japanese attacks on Malaya, Singapore and Hong Kong. The British Secretary of State for Foreign Affairs, Anthony Eden, was in transit to Moscow at the time, so Prime Minister Winston Churchill was in charge of the Foreign Office. The text of his letter to the Japanese Ambassador was as follows: Of the letter, Churchill later wrote: