9th Infantry Regiment (United States) - Lineage

Lineage

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• Withdrawn 29 April 1983 from the Combat Arms Regimental System and reorganized under the U.S. Army Regimental System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