Constituted 1 February 1957 in the Regular Army as the 25th Aviation Company, assigned to the
25th Infantry Division, and activated at
Schofield Barracks, Hawaii Reorganized and redesignated 12 August 1963 as Headquarters and Headquarters Company, 25th Aviation Battalion (organic elements constituted 21 June 1963 and activated 12 August 1963). Between 1966 and 1967 the 341st Airfield Operations Detachment was attached. Inactivated 15 October 1985 at Schofield Barracks, Hawaii. Activated 16 January 1986 at
Wheeler Air Force Base, Hawaii Relieved 16 May 1988 from assignment to the 25th Infantry Division; concurrently reorganized and redesignated as the 25th Aviation, a parent regiment under the
United States Army Regimental System. In 15 May 1991, five UH-60 helicopters from 4th Battalion, 25th Aviation Regiment were deployed to
Chittagong in
Operation Sea Angel, the United States humanitarian response to the
1991 Bangladesh cyclone. 4-25 Aviation Regiment was a major unit in the mission, distributing 891.5 tons of humanitarian supplies and 107.5 tons of military equipment, and flying about half of the total tonnage flown by all helicopters in the mission. It may at its maximum size have had up to four battalions. ==Campaign participation credit==