321st Engineer Battalion (United States) - History

History

The 321st Engineer Battalion was constituted in the National Army on 5 September 1918 as the 321st Engineers, and assigned to the 96th Division. Four months later, on 7 January 1919, the unit was disbanded. The unit was reconstituted in the Organized Reserves on 24 June 1921 as the 321st Engineers, again assigned to the 96th Division. The battalion was organized in Seattle, Washington in January 1922. On 30 January 1942, the unit was reorganized as an element of the 96th Infantry Division, and redesignated as the 321st Engineer Battalion. The battalion was ordered to active service along with the 96th Infantry Division on 15 August 1942. This time, they were organized at Camp Adair, Oregon as the 321st Engineer Combat Battalion. After service in the Pacific Theater, the unit was inactivated at Camp Anza, California on 3 February 1946. On 1 December 1946, the battalion was activated with headquarters in Reno, Nevada. On 10 November 1948, the headquarters were moved to Boise, Idaho. On 15 November 1953, the battalion was again redesignated as the 321st Engineer Battalion. They were relieved from assignment to the 96th Infantry Division on 15 February 1963. The unit was reassigned to the 70th Regional Support Command in 1996. The battalion was activated as the lead element of Task Force Pathfinder, in support of Operation Iraqi Freedom, in 2006.