During the Vietnam War, the United States supported which of these?

the Vietcong

the Vietnam Liberation Front

the North Vietnamese government

the South Vietnamese government

During the Vietnam War, the United States supported the South Government.

In spite of the U. S. economic and military aid, South Vietnamese government and the Army of the Republic of Vietnam did not demonstrate that they were capable of handling the Viet Cong (National Liberation Front).

The correct option is:

The South Vietnamese government

Explanation:

During the Vietnam War the North Vietnamese army was supported by the USSR, China, and other communist allies; while the South Vietnamese army was supported by the United States, South Korea, Australia, Thailand and other anti-communist allies. Each of the two blocks wanted to expand their own idea of system in Vietnam. The US idea was containment and that of USSR was expansionism.