USA HISTORY

Detailed explanation-1: -China had become communist in 1949 and communists were in control of North Vietnam. The USA was afraid that communism would spread to South Vietnam and then the rest of Asia. It decided to send money, supplies and military advisers to help the South Vietnamese Government.

Detailed explanation-2: -The doctrine of containment argued that all-out war should be avoided, but the US should pledge itself to stopping any new communist governments, or preventing any existing communist governments from expanding.

Detailed explanation-3: -The United States became deeply involved in Vietnam during the 1960s largely due to America’s desire to assure that developing countries modernize as capitalist and democratic. Thus, American involvement began with economic and social support in South Vietnam.

Detailed explanation-4: -The war in Vietnam had lasting consequences for US foreign policy. Congress passed the War Powers Act in 1973, in a clear attempt to reassert a measure of control over the making of foreign policy and to impose constraints on presidential power.