Lead-in Activities The Vietnam War A long civil war between South Vietnam and the North Vietnam,ending in Communist victory in 1975. U.S.was fully involved in the Vietnam War in 1965, fighting against the communist North Vietnam. Lead-in Activities The Vietnam War • A long civil war between South Vietnam and the North Vietnam, ending in Communist victory in 1975. • U.S. was fully involved in the Vietnam War in 1965, fighting against the communist North Vietnam