II Field Force, Vietnam was a
United States Army The United States Army (USA) is the land military branch, service branch of the United States Armed Forces. It is one of the eight Uniformed services of the United States, U.S. uniformed services, and is designated as the Army of the United St ...
Corps Corps (; plural ''corps'' ; from French language, French ''corps'', from the Latin ''corpus'' "body") is a term used for several different kinds of organisation. A military innovation by Napoleon, the formation was first named as such in 1805. ...
-level command during the
Vietnam War {{Infobox military conflict , conflict = Vietnam War{{native name, vi, Chiến tranh Việt Nam , partof = the Indochina Wars and the Cold War , image = File:VNWarMontage.png , image_size = 300px , ca ...
. Activated on 15 March 1966, it became the largest corps command in Vietnam and one of the largest in Army history. II Field Force was assigned the lineage of the XXII Corps, a
World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a World war, global war that lasted from 1939 to 1945. It involved World War II by country, the vast majority of the world's countries—including all the great ...
corps in the European Theater of Operations. II Field Force was a component of U.S. Military Assistance Command Vietnam (MACV) and had its headquarters in Long Binh.

Area of responsibility

II Field Force's area of responsibility was III Corps Tactical Zone, later renamed Military Region 3, which comprised eleven provinces surrounding Saigon. This was designed to mimic the ARVN III Corps region. II Field Force controlled units participating in the 1968 Tet Offensive and the 1970 Cambodian Incursion.

Units assigned

At various times during the Vietnam War, II FFV controlled the following units: * 1st Infantry Division * 9th Infantry Division * 25th Infantry Division *
101st Airborne Division The 101st Airborne Division ("Screaming Eagles") is a light infantry division (military), division of the United States Army specializing in air assault military operation, operations. The Screaming Eagles were referred to as "the tip of the sp ...
* 1st Cavalry Division (Airmobile) *3rd Brigade 82nd Airborne Division (United States), 82nd Airborne Division *3rd Brigade, 4th Infantry Division (United States), 4th Infantry Division *173rd Airborne Brigade (United States), 173rd Airborne Brigade *196th Infantry Brigade (United States), 196th Light Infantry Brigade *199th Light Infantry Brigade (United States), 199th Light Infantry Brigade *11th Armored Cavalry Regiment (United States), 11th Armored Cavalry Regiment *12th Aviation Group, 12th Combat Aviation Group *23rd Artillery Group *54th Artillery Group *53rd Signal Battalion *1st Australian Task Force *Royal Thai Army Expeditionary Division, Royal Thai Army Volunteer Force II Field Force Vietnam Headquarters Elements: *51st Infantry Regiment (United States)#Company F, Company F (Long Range Patrol) 51st Infantry (Airborne) *Company D (Ranger) 151st Infantry Regiment (United States), 151st Infantry (Airborne), Indiana National Guard *Company D (Ranger) 75th Infantry Regiment (Ranger)#Vietnam War, 75th Infantry (Airborne) *HHB, II FFV Artillery *303rd ASA Battalion *6th Psychological Operations Battalion *2nd Civil Affairs Company *552 Military Police Company *9th Transportation Company *44th Army Postal Company *29th Chemical Detachment *61st Medical Detachment (MB) *7th Military History Detachment *219th Military Intelligence Detachment *14th Public Information Detachment *16th Public Information Detachment *16th Signal Detachment *265th FA Radar Detachment (AN/TPS-25)


II Field Force was inactivated on 2 May 1971, during the withdrawal of U.S. ground combat forces from Vietnam, with its assets providing the basis for its successor, Third Regional Assistance Command (TRAC).


* Lieutenant General Jonathan O. Seaman (March 1966 – March 1967) * Lieutenant General Bruce Palmer Jr. (March–July 1967) * Major General Frederick C. Weyand (July 1967 – August 1968) * Major General Walter T. Kerwin Jr. (August 1968 – April 1969) * Lieutenant General Julian Ewell, Julian J. Ewell (April 1969 – April 1970) * Lieutenant General Michael S. Davison (April 1970 – May 1971)



* *Stanton, Shelby, ''Vietnam Order of Battle'', {{ISBN, 0-89193-700-5 Military units and formations of the United States Army in the Vietnam War Corps of the United States Army Military units and formations established in 1966 Military units and formations disestablished in 1971