The US asked him to.
he was the prime minister of Australia and he sent the troops to Vietnam
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.
As in Vietnam, Australia was asked to by the US.
France agreed to withdraw its troops
It forced French troops to leave Vietnam and divided Vietnam into two countries. (A)
He sent Australian troops to war
Australia began exiting the war in Vietnam in 1970 and most all troops were out of the country by 1973. They did briefly send troops back in 1975 to help Australian embassy workers evacuate during the Fall of Saigon.
US Secretary of Defense Robert S. McNamara believed more troops were required for the war in Vietnam. His recommendation to US President Johnson was to deploy at least 400,000 troops in Vietnam by the end of 1966.
Australian troops were sent to Vietnam on Robert Menzies orders (the Australian prime minister of the time). They were sent to Vietnam because Communism was spreading throughout Asia, and Menzies feared it coming to Australia, so he sent our troops in. Although, our troops only started out as advisers to our allies, but sometime later Menzies decided to send in our combat troops.
the supported was Robert McNamara and Dean Rush
It forced French troops to leave Vietnam and divided Vietnam into two countries. (A)
No , this decision came later during his presidency .