Perhaps people of all ideologies prefer to be alive instead of dead.
The US and North Vietnam .
The fight against the spread of Communism.
The Soviet Union (USSR) supplied North Vietnam, and the US fought for South Vietnam.
The countries that were actually "physically" involved, and were bombed or had US aircraft crash into them, whether they were "officially" in the war or not, were: Lao's, Cambodia, North Vietnam and South Vietnam.
Nobody knows. Too bad.
North Vietnam /VC vs US, AUS, NZ, PI, ROK, RVN, and Thailand.
North Vietnam and South Vietnam. Also, to name just a few: the USA, China, Russia, South Korea, Australia, France, and England. A great many countries fought in the Vietnam War from 1945 to 1975.
to keep indochina from going communist. It was part of the domino theory
korea, united states, ussr, vietnam, and germany?
France,United states of america,and vietnam no other countries because noone knew about it exept france and the U.S.A
The two countries have borders with Vietnam, and were a way to move men and materiel from North Vietnam to South Vietnam avoiding the narrow coastal region.
The United States did get involved in the Vietnam war because of communism in Vietnam.