Menzies Government (1939–41) in December 1944. The formation of a new party – the Liberal Party of Australia – was formally announced at Sydney Town Hall on 31 August 1945. After an initial loss to Labor at the 1946 election, Menzies led the Liberals to victory at the 1949 election against the incumbent Labor government led by Ben Chifley, and the Coalition stayed in office for a record 23 years. Menzies Government (1939–41) The Menzies Government (1939–1941) refers to the federal executive government of Australia led by Prime Minister Robert Menzies. Menzies led the United Australia Party in the Australian Parliament from 1939–1941.
Deputy Prime Minister of Australia leader of the Country Party (subsequently the National Party). That continues to be case when the Coalition is in government. In the case of Labor governments, the party's deputy leader was and continues to be the Deputy Prime Minister. On 19 December 1967, John McEwen, the long-serving leader of the Country Party in the Coalition government, was sworn in as interim Prime Minister following the sudden death in office of Prime Minister Harold Holt. (There was discussion that deputy Liberal leader and Treasurer William McMahon should assume the office. McMahon had planned a party room meeting on 20 December to