The 1st Battalion, 22d Infantry Regiment, was originally constituted on 3 May 1861 in the Regular Army as Companies A and I, 2nd Battalion, 13th Infantry. It organized in May 1865 at Camp Dennison, Ohio. It reorganized and was redesignated on 21 September 1866 as Companies A and I, 22nd Infantry. Companies A and I, 22nd Infantry consolidated on 4 May 1869 and the consolidated unit was designated as Company A, 22d Infantry; the 22nd Infantry being assigned on 24 March 1923 to the 4th Division [later redesignated as the 4th Infantry Division]. It inactivated on 30 June 1927 at Fort McPherson, Georgia. The unit reactivated on 1 June 1940 at Fort McClellan, Alabama, before inactivating on 1 March 1946 at Camp Butner, North Carolina. It reactivated 15 July 1947 at Fort Ord, California. It reorganized and was redesignated on 1 April 1957 as Headquarters and Headquarters Company, 1st Battle Group, 22d Infantry and remained assigned to the 4th Infantry Division (with its organic elements being concurrently constituted and activated). It was reorganized and redesignated on 1 October 1963 as the 1st Battalion, 22d Infantry. It was deployed to Vietnam as part of the 2d Brigade of the 4th Infantry Division and conducted operations in the Central Highlands. It was inactivated in August 1984 at Fort Carson, Colorado and relieved from its assignment to the 4th Infantry Division (Mechanized). It was reactivated in May 1986 at Fort Drum, New York and assigned to the 10th Mountain Division (Light). The battalion deployed to combat in Somalia in 1993 as a part of the 10th Mountain Division. Relieved in February 1996 from this assignment to the 10th Mountain Division (Light), the 1st Battalion was reassigned to the 4th Infantry Division (Mechanized) at Fort Hood, Texas. Soldiers from the 1st Battalion, 22d Infantry, deployed in late April 2002 to become part of Joint Task Force 160, as the only Army Infantry deployed to Guantanamo Bay Naval Base, Cuba. Approximately 200 soldiers from the 1st Battalion were tasked with providing external security for the detainee facilities. The battalion deployed twice from April–July and again from September–December 2002. This included fixed site security, patrols, observation posts, a quick reaction force, and also playing a role in escorting and transporting detainees. The soldiers of the 22d Infantry were awarded the Joint Meritorious Unit Award for their outstanding service in Cuba during this period.