USA HISTORY

Detailed explanation-1: -After Eisenhower’s speech, the phrase “domino theory” began to be used as a shorthand expression of the strategic importance of South Vietnam to the United States, as well as the need to contain the spread of communism throughout the world.

Detailed explanation-2: -Overview. In 1947, President Harry S. Truman pledged that the United States would help any nation resist communism in order to prevent its spread. His policy of containment is known as the Truman Doctrine.

Detailed explanation-3: -American aid would end poverty and halt its spread. In Asia, containment policy followed similar lines to those adopted in Europe. Poor countries devastated by warfare and Japanese domination were given economic aid and a US military presence to help them stem the spread of Soviet-inspired communism.

Detailed explanation-4: -The domino theory was one of the main arguments used in the Kennedy and Johnson administrations during the 1960s to justify increasing American military involvement in the Vietnam War.

Detailed explanation-5: -In 1961, President John F. Kennedy, convinced that Communist China was actively supporting North Vietnam, approved a US military campaign in Vietnam to help the nationalist government stave off the Communist rebellion.