In the 1960s and 1970s, the United States fought a war in Vietnam in order to
A.acquire more land for the U.S.
B.get revenge after being attacked.
C.defend its European allies.
D.stop the spread of communism.
A.acquire more land for the U.S.
B.get revenge after being attacked.
C.defend its European allies.
D.stop the spread of communism.