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Lineages and Honors Information
Divisions and Brigades

Lineage and Honors Information as of 7 November 2018

Headquarters, 181st Infantry Brigade

  • Constituted 5 August 1917 in the National Army as Headquarters, 181st Infantry Brigade, and assigned to the 91st Division
  • Organized 4 September 1917 at Camp Lewis, Washington
  • Demobilized in April 1919 at Camp Kearny, California
  • Reconstituted 24 June 1921 in the Organized Reserves as Headquarters and Headquarters Company, 181st Infantry Brigade, and assigned to the 91st Division
  • Organized in November 1921 at San Francisco, California
  • Redesignated 23 March 1925 as Headquarters and Headquarters Company, 181st Brigade
  • Redesignated 24 August 1936 as Headquarters and Headquarters Company, 181st Infantry Brigade
  • Converted and redesignated 6 April 1942 as the 91st Reconnaissance Troop (less 3d Platoon), 91st Division (Headquarters and Headquarters Company, 182d Infantry Brigade, concurrently converted and redesignated as the 3d Platoon, 91st Reconnaissance Troop, 91st Division)
  • Troop ordered into active military service 15 August 1942 and reorganized at Camp White, Oregon, as the 91st Cavalry Reconnaissance Troop, an element of the 91st Infantry Division
  • Reorganized and redesignated 15 August 1943 as the 91st Reconnaissance Troop, Mechanized
  • Inactivated 19 November 1945 at Camp Rucker, Alabama
  • Activated 25 January 1947 at San Francisco, California, as the 91st Mechanized Cavalry Reconnaissance Troop
  • (Organized Reserves redesignated 25 March 1948 as the Organized Reserve Corps; redesignated 9 July 1952 as the Army Reserve)
  • Reorganized and redesignated 16 March 1949 as the 91st Reconnaissance Company
  • Inactivated 17 May 1954 at San Francisco, California
  • Activated 17 April 1956 at Sonora, California
  • Disbanded 1 May 1959 at Sonora, California
  • Reconstituted (less 3d Platoon) 27 March 1963 in the Regular Army as Headquarters and Headquarters Company, 2d Brigade, 63d Infantry Division (3d Platoon, 91st Reconnaissance Company – hereafter separate lineage)
  • Activated 1 April 1963 at Pasadena, California
  • Inactivated 31 December 1965 at Pasadena, California
  • Redesignated 1 December 2006 as Headquarters and Headquarters Company, 181st Infantry Brigade; Headquarters concurrently activated at Fort McCoy, Wisconsin


Campaign Participation Credit

  • World War I
  • Ypres-Lys
  • Meuse-Argonne
  • Lorraine 1918
  • World War II
  • Rome-Arno
  • North Apennines
  • Po Valley


  • Army Superior Unit Award, Streamer embroidered 2008-2011

By Order of the Secretary of the Army:

Chief of Military History

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