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21st Infantry

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Constituted 3 May 1861 in the Regular Army as the 2d 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 32d 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Withdrawn 16 January 1986 from the Combat Arms Regimental System and reorganized under the United States Army Regimental System

ANNEX

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

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 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

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

Military History
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This Day in History
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1942: German submarine U-585 sinks.