Constituted 3 May 1861 in the Regular Army as Company C, 2d Battalion, 12th Infantry

Organized 28 May 1862 at Fort Hamilton, New York

Reorganized and redesignated 7 December 1866 as Company C, 21st Infantry

Consolidated 27 August 1869 with Company C, 32d Infantry (see ANNEX), and consolidated unit designated as Company C, 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])

Inactivated 5 June 1958 and relieved from assignment to the 24th Infantry Division

Redesignated 31 March 1959 as Headquarters and Headquarters Company, 3d Battle Group, 21st Infantry, withdrawn from the Regular Army, allotted to the Army Reserve, and assigned to the 63d Infantry Division (organic elements concurrently constituted)

Battle Group activated 1 May 1959 with Headquarters at Santa Barbara, California

Inactivated 1 April 1963 at Santa Barbara, California, and relieved from assignment to the 63d Infantry Division

Redesignated 10 September 1965 as the 3d Battalion, 21st Infantry; concurrently withdrawn from the Army Reserve, allotted to the Regular Army, and assigned to the 196th Infantry Brigade

Activated 15 September 1965 at Fort Devens, Massachusetts

Relieved 15 February 1969 from assignment to the 196th Infantry Brigade and assigned to the 23d Infantry Division

Relieved 1 November 1971 from assignment to the 23d Infantry Division and assigned to the 196th Infantry Brigade

Inactivated 23 August 1972 at Oakland, California

Relieved 16 January 1986 from assignment to the 196th Infantry Brigade, assigned to the 25th Infantry Division, and activated at Schofield Barracks, Hawaii

Inactivated 15 July 1995 at Schofield Barracks, Hawaii, and relieved from assignment to the 25th Infantry Division

Assigned 16 March 2002 to the 25th Infantry Division and activated at Fort Lewis, Washington

ANNEX

Constituted 3 May 1861 in the Regular Army as Company C, 3d Battalion, 14th Infantry

Organized in September 1865 at Hart Island, New York

Reorganized and redesignated 21 September 1866 as Company C, 32d Infantry

Consolidated 27 August 1869 with Company C, 21st Infantry, and consolidated unit designated as Company C, 21st Infantry

3d Battalion
21st Infantry Honors

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

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

Decorations

*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 1952-1953

*Republic of Vietnam Cross of Gallantry with Palm for VIETNAM 1969

*Republic of Vietnam Cross of Gallantry with Palm for VIETNAM 1969-1970

*Republic of Vietnam Cross of Gallantry with Palm for VIETNAM 1971