Original Issue U.S. Army I Field Force, Vietnam (Field Force Vietnam) shoulder patch. Full color embroiderey used during the Vietnam war and later as a combat patch by Field Force and Task Force Alpha veterans. I Field Force, Vietnam was a corps-level command of the United States Army during the Vietnam War. Activated on 15 March 1966, it was the successor to Task Force Alpha, a provisional corps command created 1 August 1965 (renamed Field Force 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. Genuine US Army Insignia, Made in the USA, in New, Unissued condition.