I Field Force, Vietnam was a

corps Corps (; plural ''corps'' ; from French , from the Latin "body") is a term used for several different kinds of organization. A military innovation by Napoleon I, the formation was first named as such in 1805. The size of a corps varies great ...

-level command of the

United States Army The United States Army (USA) is the land warfare, 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 o ...

during the

Vietnam War The Vietnam War (also known by other names) was a conflict in Vietnam, Laos, and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975. It was the second of the Indochina Wars and was officially fought between North Vietnam a ...

. Activated on 15 March 1966, it was the successor to Task Force Alpha, a provisional corps command created 1 August 1965 (renamed

Field Force A field force in British and Indian Army military parlance is a combined arms land force operating under actual or assumed combat circumstances, usually for the length of a specific military campaign. It is used by other nations, but can have a di ...

Vietnam on 25 September) for temporary control of activities of U.S. Army ground combat units arriving in Vietnam. I Field Force was a component of U.S. Military Assistance Command Vietnam (MACV) and had its headquarters at

Nha Trang Nha Trang ( or ; ) is a coastal city and capital of Khánh Hòa Province, on the South Central Coast of Vietnam. It is bounded on the north by Ninh Hoà town, on the south by Cam Ranh city and on the west by Diên Khánh District. The city ha ...

Area of Responsibility and Units Assigned

Tactical Operations Center, Nha Trang, July 1968

I Field Force's area of responsibility was

II Corps Tactical Zone The II Corps () was a corps of the Army of the Republic of Vietnam (ARVN), the army of the nation state of South Vietnam that existed from 1955 to 1975. It was one of four corps in the ARVN, and it oversaw the central highlands region, north of ...

, later renamed Military Region 2, which comprised the twelve provinces of Vietnam's Central Highlands. Among the divisions and brigades it controlled were: * 1st Cavalry Division (Airmobile) * 4th Infantry Division *3d Brigade, 25th Infantry Division *1st Brigade, 101st Airborne Division *

173rd Airborne Brigade The 173rd Airborne Brigade ("Sky Soldiers") is an airborne infantry brigade combat team (IBCT) of the United States Army based in Vicenza, Italy. It is the United States European Command's conventional airborne strategic response force for Eu ...

* 41st Artillery Group *52nd Artillery Group *77th Radar Detachment *54th Signal Battalion

Inactivation

I Field Force was inactivated on 30 April 1971 during the withdrawal of U.S. ground combat forces from Vietnam, and its assets formed the basis for its successor, the Second Regional Assistance Command (SRAC).

Commanders

*LTG

Stanley R. Larsen Stanley Robert Larsen (November 11, 1915 – November 1, 2000) was a United States Army lieutenant general who served as commander of I Field Force, Vietnam during the Vietnam War. Military career Larsen attended the United States Military Acade ...

March 1966 – July 1967 *LTG William B. Rosson July 1967– February 1968 *LTG William R. Peers March 1968 – March 1969 *LTG Charles A. Corcoran March 1969 – March 1970 *LTG

Arthur S. Collins Jr. Arthur Sylvester Collins Jr. (August 6, 1915 – January 7, 1984) was a United States Army lieutenant general who served as commander of I Field Force, Vietnam during the Vietnam War. Early life and education Collins was born on 6 August 1915 i ...

March 1970 – January 1971 *MG Charles P. Brown January 1971 – April 1971Association of I Field Force, IFFV Commanders
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Notes

Sources

* * {{Authority control 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