Lineage and Honors Information as of 10 February 2016
1st Battalion, 21st Infantry Regiment
(Gimlet)
- Constituted 3 May 1861 in the Regular Army as Company A, 2d Battalion, 12th Infantry
- Organized 20 May 1862 at Fort Hamilton, New York
- Reorganized and redesignated 7 December 1866 as Company A, 21st Infantry
- Consolidated 20 August 1869 with Company A, 32d Infantry (see ANNEX), and consolidated unit designated as Company A, 21st Infantry
- (21st Infantry assigned 29 July 1918 to the 16th Division; relieved 8 March 1919 from assignment to the 16th Division; assigned 22 October 1921 to the Hawaiian Division [later redesignated as the 24th Infantry Division])
- Redesignated 5 June 1958 as Headquarters and Headquarters Company, 1st Battle Group, 21st Infantry, and remained assigned to the 24th Infantry Division (organic elements concurrently constituted; activated 1 July 1958 in Germany)
- Reorganized and redesignated 1 February 1963 as the 1st Battalion, 21st Infantry
- Inactivated 15 April 1970 in Germany
- Relieved 5 June 1972 from assignment to the 24th Infantry Division, assigned to the 25th Infantry Division, and activated at Schofield Barracks, Hawaii
- Redesignated 1 October 2005 as the 1st Battalion, 21st Infantry Regiment
- Relieved 16 October 2005 from assignment to the 25th Infantry Division, and assigned to the 2d Brigade Combat Team, 25th Infantry Division
- ANNEX
- Constituted 3 May 1861 in the Regular Army as Company A, 3d Battalion, 14th Infantry
- Organized in August 1865 at Fort Trumbull, Connecticut
- Reorganized and redesignated 21 September 1866 as Company A, 32d Infantry
- Consolidated 20 August 1869 with Company A, 21st Infantry, and consolidated unit designated as Company A, 21st Infantry
Campaign Participation Credit
- Civil War
- Peninsula
- Manassas
- Antietam
- Fredericksburg
- Chancellorsville
- Gettysburg
- Wilderness
- Spotsylvania
- Cold Harbor
- Petersburg
- Virginia 1862
- Virginia 1863
- Indian Wars
- Modocs
- Nez Perces
- Bannocks
- Arizona 1866
- Arizona 1867
- Arizona 1868
- Arizona 1869
- Arizona 1870
- War with Spain
- Santiago
- Philippine Insurrection
- Zapote River
- Luzon 1899
- Luzon 1900
- Luzon 1901
- Luzon 1902
- World War II
- Central Pacific
- New Guinea (with arrowhead)
- Leyte
- Luzon
- Southern Philippines
- (with arrowhead)
- Korean War
- UN Defensive
- UN Offensive
- CCF Intervention
- First UN Counteroffensive
- CCF Spring Offensive
- UN Summer-Fall Offensive
- Second Korean Winter
- Korea, Summer 1953
- War on Terrorism
- Iraq:
- Transition of Iraq
- Iraqi Governance
- (Additional campaigns to be determined)
Decorations
- Presidential Unit Citation (Army), Streamer embroidered DEFENSE OF KOREA
- Presidential Unit Citation (Army), Streamer embroidered SANGHONGJONG-NI
- Valorous Unit Award, Streamer embroidered BAGHDAD 2007-2009
- Meritorious Unit Commendation (Army), Streamer embroidered IRAQ 2010-2011
- Philippine Presidential Unit Citation, Streamer embroidered 17 OCTOBER 1944 TO 4 JULY 1945
- Republic of Korea Presidential Unit Citation, Streamer embroidered PYONGTAEK
- Republic of Korea Presidential Unit Citation, Streamer embroidered KOREA 1953
By Order of the Secretary of the Army:
CHARLES R. BOWERY, JR.
Chief of Military History
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