Answer
Army Chief of Staff was Westmoreland's role after being reassigned from Vietnam. He was appointed to this position in 1968, after serving as the commander of the Military Assistance Command, Vietnam (MACV) from 1964 to 1968. As Army Chief of Staff, Westmoreland was responsible for overseeing the day-to-day operations of the U.S. Army and for advising the Secretary of the Army and the President on military matters.