[Brad from Tennessee]

[In 1975 our ‘allies’ the South Vietnam arm fought about as well as our ‘allies’ the Shia running Iraq are now.]

The ARVN fought back two invasions by North Vietnam. In 1975 Congress, led by a cabal of Democrat traitors, cut off all funds to South Vietnam and forbade the U.S. military from lending naval or air support. Financed and armed by the Soviets, the NVA finally overwhelmed the South Vietnamese.

U.S. involvement in Vietnam was about tying up Communist resources on one battleground, affording time for the non-communist Asian states—many of them just emerging from colonial rule—to develop stable governments, economies and armed forces that could cope with local communist insurgencies. To this end the war was a success.

[oh8eleven]

The ARVN fought back two invasions by North Vietnam.
They lost the second fight ... and the country. The first invasion (I assume) you're referring to was the Easter Offensive of '72.
They would have lost that one too had it not been for US Marine Captain John W. Ripley, who single-handedly stopped the NVA invasion by blowing the Dong Ha bridge.
Semper Fi ...