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The Minister for Defence (Reginald Townley) announces intention to send 30 army advisers to South Vietnam (SVN).
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The first members of the Australian Army Training Team Vietnam (AATTV) arrive in South Vietnam.
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Advisor, Sergeant William Hacking becomes the first Australian to die in Vietnam when his weapon accidentally discharges after being caught in vegetation.
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Warrant Officer Class 2, Kevin Conway becomes the first Australian to die as a result of enemy action in South Vietnam
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Australian Government, responding to requests from the US President and South Vietnam Prime Minister for 200 additional advisers, offers to send ground troops to South Vietnam.
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HMAS Sydney arrives at Vung Tau, South Vietnam, carrying the bulk of the Australian force.
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Australian Government approves increase of Australian forces to a battalion group, supported by an artillery, additional APCs, engineers, army helicopters, light aircraft and more logistic support.
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Harold Holt succeeds Menzies as Prime Minister.
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Holt announces the Australian commitment in South Vietnam will be Increased to a 4350-man task force, and will include conscripts.
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The Battle of Long Tan occurs. The battle went for a whole two years.
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Morgan Gallup Poll finds 62% in favour of continuing the war in Vietnam. (Exact date of poll unknown)
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Prime Minister Harold Holt missing, presumed drowned off Portsea in Victoria. His body is never recovered.
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John Grey Gorton sworn in as Prime Minister.