Lineage and Honors Information as of 20 May 2015
91st Engineer Battalion
- Organized 1 October 1933 in the Regular Army as the 50th Engineer Battalion
- Redesignated 10 January 1938 as the 91st Engineer Battalion
- Activated 10 February 1941 at Camp Shelby, Mississippi
- Expanded, reorganized, and redesignated 10 July 1942 as the 91st Engineer Regiment
- Redesignated 6 August 1942 as the 91st Engineer General Service Regiment
- Inactivated 20 January 1946 in the Philippines
- Regiment (less Headquarters and Headquarters Detachments, 1st and 2d Battalion, and Companies E and F) reorganized and redesignated 28 November 1951 as the 91st Engineer Combat Battalion (Headquarters and Headquarters Detachments, 1st and 2d Battalion, and Companies E and F concurrently disbanded)
- Activated 14 January 1952 at Fort Belvoir, Virginia
- Reorganized and redesignated 20 May 1952 as the 91st Engineer Battalion
- Inactivated 20 May 1971 at Fort Belvoir, Virginia
- Assigned 16 October 1992 to the 1st Cavalry Division and activated at Fort Hood, Texas
- Inactivated 15 October 2005 at Fort Hood, Texas, and relieved of assignment to the 1st Cavalry Division
- Assigned 16 October 2013 to the 1st Brigade Combat Team, 1st Cavalry Division, and activated at Fort Hood, Texas
Campaign Participation Credit
- World War II
- East Indies
- Papua
- War on Terrorism
- Iraq:
- Transition of Iraq
- Iraqi Governance
Decorations
- Presidential Unit Citation (Army), Streamer embroidered PAPUA
- Meritorious Unit Commendation (Army), Streamer embroidered ASIATIC-PACIFIC THEATER
- Meritorious Unit Commendation (Army), Streamer embroidered IRAQ 2004-2005
By Order of the Secretary of the Army:
RICHARD W. STEWART, Ph.D.
Chief of Military History
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