Constituted 5 August 1917 in the National Army as Headquarters, 172d Infantry Brigade, and assigned to the 86th Division

            Organized 25 August 1917 at Camp Grant, Illinois

            Demobilized in January 1919 at Camp Grant, Illinois

            Reconstituted 24 June 1921 in the Organized Reserves as Headquarters and Headquarters Company, 172d Infantry Brigade, and assigned to the 86th Division

            Organized in January 1922 at Springfield, Illinois

            Redesignated 23 March 1925 as Headquarters and Headquarters Company, 172d Brigade

            Redesignated 24 August 1936 as Headquarters and Headquarters Company, 172d Infantry Brigade

            Converted and redesignated 31 March 1942 as the 3d Platoon, 86th Reconnaissance Troop, 86th Division (Headquarters and Headquarters Company, 171st Infantry Brigade, concurrently converted and redesignated as the 86th Reconnaissance Troop [less 3d Platoon], 86th Division)

            Troop ordered into active military service 15 December 1942 and reorganized at Camp Howze, Texas, as the 86th Cavalry Reconnaissance Troop, an element of the 86th Infantry Division

            Reorganized and redesignated 5 August 1943 as the 86th Reconnaissance Troop, Mechanized

            Reorganized and redesignated 10 October 1945 as the 86th Mechanized Reconnaissance Troop

            Inactivated 30 December 1946 in the Philippine Islands

            (Organized Reserves redesignated 25 March 1948 as the Organized Reserve Corps; redesignated 9 July 1952 as the Army Reserve)

            3d Platoon, 86th Mechanized Reconnaissance Troop, converted and redesignated
20 May 1963 as Headquarters and Headquarters Company, 172d Infantry Brigade, and relieved from assignment to the 86th Infantry Division; concurrently withdrawn from the Army Reserve and allotted to the Regular Army (remainder of troop – hereafter separate lineage)

            Activated 1 July 1963 at Fort Richardson, Alaska

            Inactivated 15 April 1986 at Fort Richardson, Alaska

            Activated 16 April 1998 at Fort Wainwright, Alaska

            Inactivated 15 December 2006 at Fort Wainwright, Alaska

            Activated 16 March 2008 in Germany

 

CAMPAIGN PARTICIPATION CREDIT

 

DECORATIONS

            Valorous Unit Award, Streamer embroidered NINEVEH PROVINCE AND BAGHDAD

            Meritorious Unit Commendation (Army), Streamer embroidered IRAQ 2008-2009

 

BY ORDER OF THE SECRETARY OF THE ARMY: