II Field Force

II Field Force, Vietnam
II Field Force, Vietnam shoulder sleeve insignia
Active	1966–1971
Country	United States of America
Allegiance	United States Army
Type	Command
Size	Corps
Part of	Military Assistance Command, Vietnam
Headquarters	Long Binh
Engagements	Vietnam War
Commanders
Notable commanders	Julian Ewell
Insignia
Distinctive unit insignia

II Field Force, Vietnam was a United States Army Corps-level command during the Vietnam War.

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 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.

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.

At various times during the Vietnam War, II FFV controlled the following units:

II Field Force Vietnam Headquarters Elements:

II Field Force was de-activated 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).