To fight socialism but the Vietnamese knew guerilla warfare and the jungle unlike the Americans. With no clear goal in sight many people assoicate the war as a failure. The war was so unpopular that lyndon B Johnson did not run for a second term.
contain communism
The French were fighting in Vietnam in 1950 not the US.
South Vietnam
The US wanted N. Vietnam to stop fighting in S. Vietnam.
US Servicemen had been fighting communists in South Vietnam since 1955.
It was fighting for democracy and against communism.
The US re-deployed from the place.
The containment of communism.
It was a noble cause.
To prevent the spread of communism.
Eisenhower's Testerones level
The US has been fighting in Afghanistan longer it was fighting in Vietnam. It is the longest war in US history.