Some sources state about a million.
About 1,000,000 men.
Vietnam war casualties were approximately as follows : - USA : 58,209 KIA (killed in action) - North Vietnam Army + NLF (communists fighting in South Vietnam, often called Viet Cong) : 800'000 KIA (+300'000 MIA : missing in action) - Vietnamese civillians : from 900'000 to 4'000'000 killed - South Vietnam Army : 250'000 KIA + casualties from allied countries, like Australia or South Korea.
See: Statistics About the Vietnam War. Recommended by the History Channel.
South Vietnam
?........the Vietnam war was a war between north and south Vietnam and America. America was trying to defend south Vietnam from the north invading and controling their territory. so America was on the side with south Vietnam
Vietnam reunited in 1976 after the end of the Vietnam war, South Vietnam (democratic side) losing to North Vietnam (communist side).
South Vietnam are the non-communist side of Vietnam, which supported by the US vastly on war supplies, troops, and other thing to fights against the North Vietnam (the communist side).
The south, because that part of Vietnam was non-communist
South Vietnam, Australia, New Zealand, Thailand, Philippines, South Korea.
The US fought for the South.
Not being able to occupy Laos on the side of North Vietnam could have increased casualties and escalated efforts.
North Vietnam = Ho Chi Minh South Vietnam = Ngo Dinh Diem