The 1st Battalion (Attack), 25th Aviation Regiment was derived from the 53rd Attack Helicopter Battalion, which had absorbed D Company 25th Combat Aviation Battalion; therefore, 1-25 Aviation retains honors and lineage from the 25th Combat Aviation Battalion. The 25th Aviation Company was constituted in the Regular Army on 1 February 1957 and activated in Hawaii as a unit of the 25th Infantry Division. On 16 March 1966, the 25th Combat Aviation Battalion (CAB) embarked for the Republic of Vietnam (Chu Chi Air Base). During the next five years, the 25th Combat Aviation Battalion conducted combat aviation operations in support of the 25th Infantry Division. Following the redeployment of the 25th Infantry Division from the Republic of Vietnam, the colors of the 25th Combat Aviation Battalion were cased on 15 December 1970 in ceremonies at Schofield Barracks. On 5 April 1972, the 25th Combat Aviation Battalion was reactivated and until 1985, the 25th Combat Aviation Battalion continued to serve as a unit of the 25th Infantry Division. The history of D Company, 25th Combat Aviation Battalion is traced from the 118th Assault Helicopter Company. The 118th was activated on 25 June 1963 in the Republic of Vietnam, having participated in fifteen campaigns in the Republic of Vietnam, the 118th was the most highly decorated aviation company in the United States Army when it was deactivated. On 16 May 1981, D Company 25th Combat Aviation Battalion was activated upon the deactivation of the 118th Assault Helicopter Battalion. A decision was made to maintain the honors and lineage of the 25th Combat Aviation Battalion, and the 53rd was re-designated as the 1st Battalion (Attack), 25th Aviation Regiment under the Regimental system on 16 January 1986. 1st Battalion (Attack), 25th Aviation Regiment was reorganized on 24 June 1999, when the last AH-1 (Cobra) Attack helicopters in the active Army were turned over to U.S. Army Reserve and National Guard Units. Between July 1999 and May 2000, 1st Battalion (Attack), 25th Aviation Regiment underwent an aircraft modernization to the OH-58D Kiowa Warrior. From March to September 2002, Task Force 1-25 AVN conducted reconnaissance, security, and air movement operations in the SFOR area of responsibility in order to maintain a safe and secure environment and create the conditions for a lasting consolidation of peace without further need of NATO-led forces in Bosnia-Herzegovina. On order the Task Force conducted COMSFOR directed air operational reserve missions.