COMUSMACV ( /ˌkɒm.juːɛsˌmækˈviː/ "com-U.S.-mack-vee") was a U.S. military abbreviation during the Vietnam War standing for Commander, U.S. Military Assistance Command, Vietnam.[1] COMUSMACV was in one sense the top person in charge of the U.S. military on the Indochinese peninsula; however, in reality, the CINCPAC and the U.S. ambassadors to Vietnam, Laos, and Cambodia also had "top person in charge" status with regard to various aspects of the war's strategy.
| General Paul D. Harkins | 1962–1964 |
| General William C. Westmoreland | 1964–1968 |
| General Creighton Abrams | 1968–1972 |
| General Frederick C. Weyand | 1972–1973 |