The 4th Cavalry Brigade is an AC/RC unit based at Fort Knox, Kentucky. The unit is responsible for training selected United States Army Reserve & National Guard units that are based East of the Mississippi River. The brigade was originally formed as an element of the 2nd Cavalry Division but was inactivated after the division was broken up. The unit was formerly designated as 4th Brigade, 85th Division. The brigade is a subordinate unit of the 1st Army.
Organization World War II Headquarters and Headquarters Troop, 4th Cavalry Brigade 9th Cavalry Regiment (Cld) 10th Cavalry Regiment (Cld) 28th Cavalry Regiment (Cld)
Organization 2026 The 4th Cavalry Brigade is a Multi-Functional Training Brigade (MFTB) assigned to the 85th Support Command. Like all formations of the 85th Support Command, the brigade is not a combat formation, but instead trains Army Reserve and Army National Guard units preparing for deployment. As of January 2026, the brigade consists of a Headquarters and Headquarters Company, five active duty battalions, and five reserve battalions.
4th Cavalry Brigade, at Fort Knox (KY) Headquarters and Headquarters Company, at Fort Knox (KY) 1st Battalion, 311th Regiment (Training Support), in Richmond (VA) 3rd Battalion, 337th Regiment (Training Support), at Fort Knox (KY) 2nd Battalion, 340th Regiment (Training Support), in Louisville (KY) 3rd Battalion, 383rd Regiment (Training Support), at Jefferson Barracks Military Post (MO) 1st Battalion, 409th Regiment (Brigade Engineer Battalion), at Fort Knox (KY) 3rd Battalion, 409th Regiment (Brigade Support Battalion), at Joint Base Charleston (SC) 4th Battalion, 409th Regiment (Brigade Support Battalion), at Fort Knox (KY) 1st Battalion, 410th Regiment (Brigade Engineer Battalion), at Fort Knox (KY) 4th Battalion, 410th Regiment (Brigade Support Battalion), at Fort Knox (KY) 1st Battalion, 411th Regiment (Logistical Support), at Fort Knox (KY)
The brigade's four training support battalions and logistical support battalion are Army Reserve formations.
Lineage Constituted 25 August 1942 in the Army of the United States as Headquarters, 4th Tank Destroyer Group
Activated 1 September 1942 at Camp Hood, Texas
Inactivated 26 October 1945 at Fort Jackson, South Carolina
Disbanded 5 August 1952
Reconstituted 24 October 1997 in the Regular Army as Headquarters, 4th Cavalry Brigade, and activated at Fort Knox, Kentucky
Inactivated 16 October 1999 at Fort Knox, Kentucky
Activated 1 December 2006 at Fort Knox, Kentucky
Unit decorations Ribbon Award Year OrdersArmy Superior Unit Award2008-2011
Campaign participation credit Conflict Streamer Year(s) World War II Normandy 1944 Northern France 1944 Rhineland 1945 Ardennes-Alsace Campaign 1944–1945 Central Europe 1945
References
The Brigade, A History by John J. McGrath from the Combat Studies Institute Press, Fort Leavenworth, Kansas.
External links Brigade Homepage 4th Cavalry Brigade at Global Security Division East (1st Army) 4/85th Division at Global Security