We left, they left. That was the factor.
The question is wrong. By the time Gough Whitlam was elected, there were no Australian combat troops in Vietnam - they had already been withdrawn by the Liberal government in line with the U.S. withdrawal. All that remained were 100 or so military advisers and embassy guards.
Australian armor (Centurian tanks) and armored personnel carriers (US M-113's), as well as regular infantrymen were sent to Vietnam.
Richard Nixon
Australia sent a regiment of their Centurion tanks to Vietnam, along infantry and artillery.
Close to 7,000 Australians at their peak strength.
Mexican troops; Platoon 201
On 28 April, 1965, Australian Prime Minister, Robert Menzies, announced that Australian troops would be sent to support the United States forces in the Vietnam war. The first Australian troops arrived in Vietnam in May 1965.
Ultimately the withdrawal of American troops from Vietnam could be used to define the end of the war, the last of the American troops did not leave until the Paris Peace accords were signed in 1973.
They were drafted.
1962
The question is wrong. By the time Gough Whitlam was elected, there were no Australian combat troops in Vietnam - they had already been withdrawn by the Liberal government in line with the U.S. withdrawal. All that remained were 100 or so military advisers and embassy guards.
Approximately 1962.
By 1972.
It took 4 years to fully withdraw U.S. troops.
Australian troops entered into the Vietnam War on the 29th April 1965.
If he was their president in '72; then yes.
As in Vietnam, Australia was asked to by the US.