left|100px|thumb|Harold Holt, Prime Minister 1966–67 thumb|Prime Minister Harold Holt (second from left), with SEATO leaders in Manila, in 1966. The Liberal Party was in power through much of the early Post-War period in which Australia's allegiances, immigration and trade policies shifted away from reliance on the United Kingdom. Harold Holt replaced the retiring Robert Menzies in 1966 and the Holt government went on to win 82 seats to Labor's 41 at the 1966 election. Holt remained prime minister until 19 December 1967, when he was declared presumed dead two days after disappearing in rough surf in which he had gone for a swim. His body has never been found.
left|100px|thumb|.Harold Holt, Prime Minister 1966–67 thumb|Prime Minister Harold Holt (second from left), with SEATO leaders in Manila, in 1966. The Liberal Party was in power through much of the early Post-War period in which Australia's allegiances, immigration and trade policies shifted away from reliance on the United Kingdom. Harold Holt replaced the retiring Robert Menzies in 1966 and the Holt government went on to win 82 seats to Labor's 41 at the 1966 election. Holt remained prime minister until 19 December 1967, when he was declared presumed dead two days after disappearing in rough surf in which he had gone for a swim His body has never been found.