Abrams was the last.
1st was USA GEN Paul Harkins, then GEN Westmoreland, then finally GEN Abrams.
General William Westmoreland
No, he wasn't.
William Childs Westmoreland
Commander in Chief: President of the US (LBJ).
General Westmoreland was the commander of all U.S. forces during Vietnam.
Commander in Chiefs were Johnson & Nixon; Vietnam US commander's were US Army Generals Westmoreland & Abrams.
There were several generals in charge over the course of the war: General Westmoreland is the best known as had it during the 70's.
US Army GEN Westermoreland; a WWII veteran.
Ike was the wars first commander in chief.
Major General A. L. McDonald was Australia's commander in Vietnam.
B52 Nixon, Commander in Chief; used the B52 against North Vietnam more than any other US president.