1st Brigade Combat Team, 1st Infantry Division (United States)

Headquarters and Headquarters Company was constituted 24 May 1917 into the Regular Army as Headquarters, 1st Brigade, an element of the 1st Expeditionary Division (later redesignated as the 1st Infantry Division).[2]

• 1st Infantry Brigade
  • 16th Infantry Regiment
  • 18th Infantry Regiment
  • 2nd Machine Gun Battalion

• 1917

1. 9 June Colonel Omar Bundy
2. 28 June Brigadier General Omar Bundy
3. 25 August Colonel Ulysses G. McAlexander (ad interim)
4. 30 August Brigadier General Omar Bundy
5. 8 September Brigadier General George B. Duncan

• 1918

1. 16 January Colonel John L. Hines (ad interim)
2. 21 January Brigadier General George B. Duncan
3. 5 May Brigadier General John L. Hines
4. 27 August Brigadier General Frank Parker
5. 18 October Colonel Hjalmar Erickson (ad interim)
6. 21 November Brigadier General Frank Parker
7. 20 December Colonel Charles A. Hunt (ad interim)

• 1919

1. 5 January Brigadier General Frank Parker
2. 12 January Colonel Charles A. Hunt (ad interim)
3. 17 January Brigadier General Frank Parker
4. 27 January Colonel William F. Harrell (ad interim)
5. 29 January Brigadier General Frank Parker
6. 16 February Colonel Charles A. Hunt (ad interim)
7. 29 March Brigadier General Frank Parker
8. 1 April Colonel Charles A. Hunt (ad interim)
9. 11 April Brigadier General Frank Parker
10. 25 April Colonel Charles A. Hunt (ad interim)
11. 7 May Lieutenant Colonel Edward R. Coppock (ad interim)
12. 9 May Lieutenant Colonel William F. Hoey (ad interim)
13. 13 May Brigadier General Frank Parker
14. 8 July Colonel William W. McCammon (ad Interim)
15. 18 July Brigadier General Frank Parker
16. 21 July Colonel William W. McCammon (ad interim)
17. 24 July to 3 September Brigadier General Frank Parker

The 1st Infantry Brigade was stationed in New York City, as part of the 1st Infantry Division until 11 October 1939, when it was inactivated when the division was converted to a Triangular Table of Organization and Equipment.[3]

• 1st Infantry Brigade, Fort Wadsworth
  • 16th Infantry Regiment, Fort Jay
  • 18th Infantry Regiment, Fort Hamilton

After the army's conversion to the triangular division, only two separate brigades were formed during World War II, the 1st Airborne Infantry Brigade and the 2nd Airborne Infantry Brigade.[4]^: 29 The 1st Airborne Infantry Brigade was formed at Fort Benning, Georgia, on 20 July 1942 originally as the 1st Parachute Infantry Brigade.[5] The unit changed its name from "parachute" to "airborne" after having the 88th Glider Infantry Regiment assigned to it. After having its units removed and sent to different theatres the brigade was disbanded seven months later.[6]

Under the United States Army's pentomic reorganisation, the 1st Infantry Brigade was recreated as an independent unit at Ft. Benning from 1958 to 1962. When the First Brigade rejoined the 1st Infantry Division the brigade was renamed the 197th Infantry Brigade.[4]^: 231

On 23 July 2003, US Army Forces Command alerted the 1st Brigade for deployment to the Iraq Theater of Operations in support of Operation Iraqi Freedom. The brigade deployed its main body starting on 2 September, closing in Kuwait by 11 September. Initially attached to the 82nd Airborne Division, the brigade occupied Area of Operations Topeka and conducted Transition of Authority with the 3rd Squadron, 3d Armored Cavalry Regiment, on 26 September. On 20 March 2004, CJTF-7 attached 1st Brigade to the 1st Marine Division to continue its offensive operations in AO Topeka.

In the following twelve months, the brigade's offensive operations killed 541 insurgents, wounded 101 more, and detained over 2,081 enemy fighters, including the capture of 18 high-value targets and 20 foreign fighters. The brigade responded to hundreds of small arms and RPG engagements, as well as over 550 IED (improvised explosive device) attacks. In order to disrupt the enemy's ability to conduct operations, the brigade captured 41 heavy machine guns, 175 RPG launchers, 3,134 mortar and artillery rounds, 1,781 rockets, and 17 surface-to-air missiles. In addition to combat operations, the brigade formed and trained the 60th Iraqi National Guard Brigade, including the 500th, 501st, and 502nd ING Battalions. 1st Brigade also sponsored over $23.8 million in civil projects in the Al Anbar province. The BCT returned to Fort Riley in September 2004.

In January 2005 the 1st Brigade was again called upon to prepare for deployment for OIF. The brigade spent the majority of 2005 refitting and training for deployment in fall 2005. This training culminated with the brigade's deployment to the Joint Readiness Training Center in August and September 2005.

In January 2006 the 1st Brigade received a mission change and began restructuring in order to better train military transition teams for their deployment.[7][8][9][10]

Several security force companies, or SECFOR companies, began preparing to deploy to Iraq in the fall of 2006.

On 23 September 2009, the brigade officially moved the military transition team mission to Fort Polk, Louisiana, and stood up as a deployable heavy brigade combat team.[11] The last of the MiTTs trained by the brigade completed their mission in October 2010.[12]

On the 24th of February 2022, the same day as the 2022 Russian invasion of Ukraine started, President Joe Biden extended the 1st Brigade Combat Team's deployment to Europe where it would be used to bolster NATO deterrence in Europe.[13]