The Australians and New Zealanders operated in III Corps (MR3=Military Region 3). This is the Saigon AO (Area of Operations).
At the Long Tan Rubber Plantation, about 5km from Nui Dat
See site: Battle of Long Tan
In the Battle Of Long Tan the Australians were fighting the Viet Cong.
See: Battle of Long Tan
The Battle of Long tan lasted 16 hours from early 18th August 1966 to night time.
The Battle of Long Tan - 2006 TV is rated/received certificates of: Australia:M
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Australian Centurion tanks fought at the battle of Long Tan and north of Saigon in 1968 during the TET offensive.
The Long Tan battle was a two day fight (August 18-19, 1966). A Previous action in Phuc Tuy Province was December 28, 1964 to January 1, 1965.
The cast of The Battle of Long Tan - 2006 includes: Matthew Wollaston as Australian Soldier Sam Worthington as Narrator
That might be Australia's first battle; read about it on the website.
The Battle of Long tan was the Australians first big fight during the Vietnam War in 1966.