The 229th Aviation Regiment is an aviation unit of the United States Army. 229th Assault Helicopter Battalion and 229th Aviation Battalion The unit was constituted on 18 March 1964 in the Regular Army as the 229th Assault Helicopter Battalion, an element of the 11th Aviation Group, 11th Air Assault Division (Test) and activated on 19 March 1964 at Fort Benning, Georgia. It was redesignated on 1 July 1965 as the 229th Aviation Battalion, an element of the 1st Cavalry Division (Airmobile), when the assets of the 11th Air Assault Division (Test) and the 2d Infantry Division were merged and reflagged as the 1st Cavalry Division (Airmobile). The 229th Aviation Battalion (Assault Helicopter) took part in the Vietnam War and remained behind when the 11th Aviation Group departed with the bulk of the division, providing support to the 3d Brigade, 1st Cavalry Division (Airmobile) at Bien Hoa in June 1971. The following units were part of the 229th in Vietnam: Company A (Assault Helicopter), September 1965-August 1972, departed Vietnam Company B (Assault Helicopter), September 1965-August 1972, departed Vietnam Company C (Assault Helicopter), September 1965-August 1972, departed Vietnam Company D (Aerial Weapons), September 1965-August 1972, departed Vietnam 362d Aviation Company (Assault Support Helicopter), June 1971-August 1972, departed Vietnam Troop F, 9th Cavalry (Air Cavalry), June 1971-August 1972, transferred to the 12th Aviation Group Troop F, 9th Cavalry was formed in Vietnam as Troop H, 16th Cavalry, a designation never approved by the Department of the Army. Properly Troop F, 9th Cavalry, its true designation was not used in Vietnam until the May 1972 time frame. Many records of the period June 1971-May 1972 show this particular unit under its unauthorized designation. Source: Vietnam Order of Battle: A Complete Illustrated Reference to U.S. Army Combat and Support Forces in Vietnam 1961-1973 by Shelby L. Stanton The 229th departed Vietnam on 12 August 1972 and was inactivated ten days later at Fort Hood, Texas, where it was relieved from assignment to the 1st Cavalry Division. It was reactivated on 21 September 1978 at Fort Campbell, Kentucky, as an element of the 101st Airborne Division (Air Assault). During much of the 1980s its Company D was based at Fort Rucker, Alabama. Concurrent with the redesignation of aviation units to a regimental system, the 229th was inactivated on 16 October 1987 at Fort Campbell, and relieved from assignment to the 101st Airborne Division (Air Assault). Subsequently,