The 22d Chemical Battalion is a chemical battalion of the United States Army first organized on 26 November 1917.
Organized 26 November 1917 in the National Army at Washington, D.C. as Company C, 30th Engineers
Converted and redesignated 13 July 1918 as Company C, 1st Gas Regiment
Demobilized 28 February 1919 at Camp Kendrick, New Jersey
Reconstituted 3 February 1920 in the Regular Army as Company C, 1st Gas Regiment, and organized at Edgewood Arsenal, Maryland
Reorganized and redesignated 13 July 1927 as the 1st Chemical Company
Reorganized and redesignated 1 April 1931 as the 1st Separate Chemical Company
Reorganized and redesignated 21 March 1942 as the 1st Chemical Company
Inactivated 29 May 1943 at Camp Sibert, Alabama
Activated 10 March 1958 at Fort McClellan, Alabama
Redesignated 19 May 1958 as the 22d Chemical Company
Inactivated 20 July 1966 in Vietnam
Assigned 21 September 1979 to the 3d Armored Division and activated in Germany
Inactivated 15 August 1992 in Germany and relieved from assignment to the 3d Armored Division
Redesignated 16 October 2004 as the 22d Chemical Battalion (Technical Escort) and activated at Aberdeen Proving Ground, Maryland
World War I: St. Mihiel; Meuse-Argonne; Lorraine 1918
World War II: American Theater, Streamer without inscription
Vietnam: Counteroffensive; Counteroffensive, Phase II
Southwest Asia: Defense of Saudi Arabia; Liberation and Defense of Kuwait; Cease-Fire
War on Terrorism: Campaigns to be determined
Meritorious Unit Commendation (Army), Streamer embroidered SOUTHWEST ASIA 1990–1991
Meritorious Unit Commendation (Army), Streamer embroidered IRAQ 2005-2006
