The second commander of the Military Assistance Command - Vietnam (MACV) was also its most famous, serving in the position during the Tet Offensive of 1968 before being promoted to Army Chief of Staff, although his legacy in Vietnam remains controversial.

Regarded by many as perhaps the best commander in the Army of the Republic of Vietnam, Ngo Quang Truong led ARVN forces in the Battle of Hue during the Tet Offensive, as well as in the final campaigns as the South Vietnamese government collapsed in 1975.