21st Infantry Regiment (United States)

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21st Infantry Regiment
21 INF DUI.png
Distinctive unit insignia
Active 1862–present
Country  United States
Branch  United States Army
Type Infantry
Garrison/HQ Fort Wainwright, Alaska; Schofield Barracks, Hawaii
Nickname(s) "Gimlet" (special designation)[1]
Motto Duty
Engagements American Civil War
Indian Wars
War with Spain
Philippine–American War
World War II
Korean War
Vietnam War
Operation Iraqi Freedom
Armed Forces Expeditions – Panama
U.S. Infantry Regiments
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20th Infantry Regiment 22nd Infantry Regiment

The 21st Infantry Regiment ("Gimlet"[1]) is a United States Army infantry regiment.


  • Constituted 3 May 1861 in the Regular Army as the 2nd Battalion, 12th Infantry
  • Organized 20 May 1862 at Fort Hamilton, New York
  • Reorganized and redesignated 7 December 1866 as the 21st Infantry
  • Consolidated 9–31 August 1869 with the 32nd Infantry (see ANNEX) and consolidated unit designated as the 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)
  • Relieved 5 June 1958 from assignment to the 24th Infantry Division and reorganized as a parent regiment under the Combat Arms Regimental System
  • Withdrawn 16 January 1986 from the Combat Arms Regimental System and reorganized under the United States Army Regimental System


  • Constituted 3 May 1861 in the Regular Army as the 3d Battalion, 14th Infantry
  • Organized 27 July 1865 at Fort Trumbull, Connecticut
  • Reorganized and redesignated 21 September 1866 as the 32d Infantry
  • Consolidated 9–31 August 1869 with the 21st Infantry and consolidated unit designated as the 21st Infantry

Campaign participation credit[edit]

  • 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–American War: Zapote River; Luzon 1899; 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
  • Vietnam: Counteroffensive, Phase II; Counteroffensive, Phase III; Tet Counteroffensive; Counteroffensive, Phase IV; Counteroffensive, Phase V; Counteroffensive, Phase VI; Tet 69/Counteroffensive; Summer-Fall 1969; Winter-Spring 1970; Sanctuary Counteroffensive; Counteroffensive, Phase VII; Consolidation I; Consolidation II; Cease-Fire
  • Armed Forces Expeditions: Panama
  • Operation Uphold Democracy, Port-au-Prince, Haiti, 1995
  • Operation Iraqi Freedom and Enduring Freedom (Afghanistan), Global War on Terrorism


An assault team from C Company, 3rd Battalion, 21st Infantry Regiment clears an objective during a demonstration for Battalion, 5th Group, 5th Ghurkha Rifles (Frontier Force) during Exercise Yudh Abhyas
  • Valorous Unit Award for OIF 3 August–October 2004 – 2005
  • Presidential Unit Citation (Army) for OIF II
  • Presidential Unit Citation (Army) for DEFENSE OF KOREA
  • Presidential Unit Citation (Army) for SANGHONGJONG-NI
  • Valorous Unit Award for TAM KY - TIEN PHUOC
  • Navy Unit Commendation for CAM LO
  • Philippine Presidential Unit Citation for 17 OCTOBER 1944 TO 4 JULY 1945
  • Republic of Korea Presidential Unit Citation for PYONGTAEK
  • Republic of Korea Presidential Unit Citation for KOREA

See also[edit]


 This article incorporates public domain material from the United States Army Center of Military History document "21st Infantry Lineage and Honors".
  1. ^ a b "Special Unit Designations". United States Army Center of Military History. 21 April 2010. Archived from the original on 9 June 2010. Retrieved 24 June 2010.