Constituted 3 March 1855 in the Regular Army as the 9th Infantry
Organized 26 March 1855 at Fort Monroe, Virginia
Constituted 3 May 1861 in the Regular Army as the 2d Battalion, 18th Infantry
Organized in October 1861 at Camp Thomas, Ohio
Consolidated in June 1869 with the 27th Infantry and consolidated unit designated as the 9th Infantry
Reorganized and redesignated 21 September 1866 as the 27th Infantry
Assigned 22 September 1917 to the 2d Division (later redesignated as the 2d Infantry Division)
Relieved 20 June 1957 from assignment to the 2d Infantry Division and reorganized as a parent regiment under the Combat Arms Regimental System
Withdrawn 29 April 1983 from the Combat Arms Regimental System and reorganized under the United States Army Regimental System

Civil War
Murfreesborough
Chickamauga
Chattanooga
Atlanta
Kentucky 1862
Mississippi 1862
Tennessee 1863
Georgia 1864

Indian Wars
Little Big Horn
Washington 1856
Washington 1858
Wyoming 1866
Wyoming 1867

War with Spain
Santiago

China Relief Expedition
Tientsin
Yang-tsun
Peking

Philippine Insurrection
Malolos
San Isidro
Zapote River
Tarlac
Luzon 1899
Luzon 1900
Luzon 1901

World War I
Aisne
Aisne-Marne
St. Mihiel
Meuse-Argonne
Ile de France 1918
Lorraine 1918

World War II
Normandy (with arrowhead)
Northern France
Rhineland
Ardennes-Alsace
Central Europe

Korean War
UN Defensive
UN Offensive
CCF Intervention
First UN Counteroffensive
CCF Spring Offensive
UN Summer-Fall Offensive
Second Korean Winter
Korea, Summer-Fall 1952
Third Korean Winter
Korea, Summer 1953

Vietnam
Counteroffensive
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

Armed Forces Expeditions
Panama

Presidential Unit Citation (Army), Streamer embroidered BREST, FRANCE

Presidential Unit Citation (Army), Streamer embroidered SIEGFRIED LINE

Presidential Unit Citation (Army), Streamer embroidered ARDENNES

Presidential Unit Citation (Army), Streamer embroidered HONGCHON

Presidential Unit Citation (Navy), Streamer embroidered HWACHON RESERVOIR

Navy Unit Commendation, Streamer embroidered PANMUNJOM

French Croix de Guerre with Palm, World War I, Streamer embroidered CHATEAU THIERRY

French Croix de Guerre with Palm, World War I, Streamer embroidered AISNE-MARNE

French Croix de Guerre with Palm, World War I, Streamer embroidered MEUSE-ARGONNE

French Croix de Guerre, World War I, Fourragere

Luxembourg Croix de Guerre, Streamer embroidered LUXEMBOURG

Belgian Fourragere 1940

Cited in the Order of the Day of the Belgian Army for action in the ARDENNES

Cited in the Order of the Day of the Belgian Army for action at ELSENBORN CREST

Republic of Korea Presidential Unit Citation, Streamer embroidered NAKTONG RIVER LINE

Republic of Korea Presidential Unit Citation, Streamer embroidered KOREA

Republic of Vietnam Cross of Gallantry with Palm, Streamer embroidered VIETNAM 1966-1968

Republic of Vietnam Cross of Gallantry with Palm, Streamer embroidered VIETNAM 1968-1970

Republic of Vietnam Civil Action Honor Medal, First Class, Sreamer embroidered VIETNAM 1966-1970

    Company C additionally entitled to:
Presidential Unit Citation (Army), Streamer embroidered TAY NINH PROVINCE