Question

What war is seen as the US first major war

Answer 1

South and North Vietnam. South started in 1961 and but withdraws combat troops in 1973. Then in 1975 North Vietnam started. This was the longest US war.

Answer 2

The United States has fought five major wars — Korea, Vietnam, the Gulf War, Iraq, Afghanistan — and only the Gulf War in 1991 can really be classified as a clear success. Hope this helps!