(1954-75) a long civil war between the Communist forces of North Vietnam and the non-Communist forces of South Vietnam, which ended when South Vietnam was finally defeated in 1975, and Vietnam was united again as one country. Between 1965 and 1973, US soldiers fought in Vietnam to support the army of South Vietnam, and when people in the west talk about the Vietnam War, or simply about Vietnam they usually mean this period of US involvement.
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.
Dictionary pictures of the day
Do you know what each of these is called?
Click on any of the pictures above to find out what it is called.