Original contribution
30 Military Advisors for AATTV, followed by 1st battalion, RAR

First Increase
Prompted by a request from President Johnson on 26 July 1965, the increase was minimal due to Australian commitments elsewhere in the Asian region, merely augmenting additional ancillary and support units to the battalion already in Vietnam.

Second Increase
Announced in March 1966. This time however, it resulted from an Australian initiative rather than from any outside request. The Vietnam force was increased from 1,400 to 4,500, which Prime Minister Holt told President Johnson represented the upper limit of the Australian capacity.

Third Increase
Prime Minister Holt was re-elected in November 1966 with an increased majority. Immediately following this, he asked cabinet to consider an extra battalion for Vietnam. The size of the force was thus increased by 900, though a decision to increase the number of battalions was postponed, bringing the force to 6,300.

Fourth Increase
The final troop increase was announced in October 1967. Washington had deployed a mission to Australia and New Zealand to discuss further committal of troops to Vietnam. The Australian contingent emphasised the strain already placed on resources. In September, Secretary McNamara responded to an exposition by the Treasurer William McMahon about these problems saying that "none of the US allies were bearing their fair share in Vietnam and that they, including Australia, could do more"(8). McMahon then recommended that Australia should announce the commitment of the third battalion that was done on 6th October.

Decreasing commitment and evacuation
By late 1970 Australia had begun to wind down its military effort in Vietnam. The 8th Battalion departed in November, but to make up for the decrease in troop numbers the team's strength was increased, and its efforts, like those of the taskforce, became concentrated in Phouc Tuy province. The withdrawal of troops continued throughout 1971, the last battalion left Nui Dat on 7 November, while a handful of advisers belonging to the team remained in Vietnam until the following year. In December 1972 they became the last Australian troops to come home- their unit had seen continuous service in South Vietnam for ten and a half years.

From the time of the arrival of the first members of the team in 1962 some 50,000 Australians, including ground troops and Air Force and Navy personnel, served in Vietnam; 496 were killed and almost 2,400 wounded. The war was the cause of the greatest social and political dissent in Australia since the conscription referendums of the First World War. Many draft resisters, conscientious objectors and protesters had been fined or gaoled, while soldiers sometimes met a hostile reception on their return home
 

Australian Involvement
Maximum Presence	8,600
Total Number who served from 1962 - 1973	46 852
Number killed	494
Casualties	3,100
Financial Cost to Australia	Officially $A218.4million Unofficially as high as $500 million

A total of 508 Australians died in Vietnam: 478 Army personnel, 14 RAAF personnel, 9 Navy personnel and 7 civilians. This number includes 6 Australian servicemen who were declared Missing in Action during the war. These 6 are believed to have been killed in action but have no known graves.