No (the Republic of) Vietnam is an independent country in South East Asia and is not a part of Australia
Vietnam is part of the Eurasian Continent; Australia is a separate continent (or a very large island).
It is an estimated 3,123 miles between Vietnam and the closest part of Australia. The flight time between these locations is 7 hours and 26 minutes.
Australia was part of the now-defunct Southeast Asia Treaty Organization (SEATO) alliance (as was the US, the Republic of Vietnam, and others). That's the reason.
Australia never fought Vietnam.
Australia had nothing to do with the Vietnam War.
New Zealand was part of ANZUS (allied with Australia & US).
Australia and Vietnam have had diplomatic ties since about 1973. Australia is Vietnam's 4th largest export market and seventh largest commercial trading partner.
Australia sent Warships (Destroyers); Infantrymen and Centurion tanks to Vietnam.
Part of SEATO (Southeast Asia Treaty Organization) & ANZUS (Australia New Zealand United States treaty).
Part of the ANZUS treaty; Australia, New Zealand, and the United States.
Australia is bigger than Vietnam.
The groups within Australia that supported our involvement in the Vietnam war were: * The Returned Service League (RSL) * The Liberal party and Country (now known as National)party and * The older generation