Ho and thieu
North Vietnam was pro-communist. South Vietnam was anti-communist.
became Communist and reunited with North Vietnam
Containing it=Keeping it from spreading. Example 1: Keeping Communist North Vietnam from conquering South Vietnam; which failed (South Vietnam was consumed by communist North Vietnam). Example 2: Keeping Communist North Korea from conquering South Korea; which succeeded (South Korea was preserved).
Communist North Vietnam was trying to take over the non-communist country of South Vietnam. The US fought North Vietnam to stop them.
To defend South Vietnam from the oppression of the Communist North Vietnam.
To prevent the communist take over of the NON-communist Republic of South Vietnam, by Communist NORTH Vietnam.
Communist North Vietnam re-united with the NON-Communist SOUTH Vietnam, creating ONE Communist country; Vietnam.
Preventing Communist North Vietnam from taking over the Free Non communist country of South Vietnam.
A war to preserve the Free Republic of South Vietnam from a communist take over by Communist NORTH Vietnam.
During the Viet War North Vietnam was a communist nation; the Republic of South Vietnam, which no longer exists, was a free democratic nation. After the war ended in 1975 both N & S Vietnam became one communist country (because North Vietnam won the war, they conquered the Republic of South Vietnam).
To stop communist North Vietnam from taking over the non-communist country of South Vietnam.
North and South Vietnam were reunited as a Communist state.