29th Cavalry, Composite

Recently I have been doing research on the 29th Cavalry, Composite. Does anyone have more information than what I've found below, and was it a training unit?
- Constituted 19 December 1942 as 29th Cavalry Composite
- Activated on 23 January 1943 at Fort Riley under Replacement & School Command
- Commanded by temporary colonel Thomas T. Thornburgh
- Inactivated 1 May 1944 at Fort Riley
- Disbanded 12 December 1951
Sources: Thornburgh's West Point obituary, Sawicki Cavalry Regiments of the US Army, and Stanton US Army WWII Order of Battle