Military Wiki
21st Infantry Regiment
Coat of arms
Active 30 May 1862-
Country United States
Type Infantry
Garrison/HQ Fort Wainwright, Alaska; Schofield Barracks, Hawaii
Nickname(s) Gimlet (special designation)[1]
Motto(s) "Duty"
Engagements American Civil War
Indian Wars
War with Spain
Philippine–American War
World War II
Korean War
Vietnam War
Armed Forces Expeditions - Panama
Distinctive unit insignia 21 INF DUI.gif

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  • Withdrawn 16 January 1986 from the Combat Arms Regimental System and reorganized under the United States Army Regimental System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

  • 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 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

Korean War casualty

July-10-1950: One of four Americans of the 21st Infantry Regiment found between the forward observation post and the front line. The men were probably captured the night of July 9th, and shot thru the head with their hands tied behind their backs


 This article incorporates public domain material from the United States Army Center of Military History document "21st Infantry Lineage and Honors".

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