The National Guard's 23rd Cavalry Division was created from the perceived need for additional cavalry units. It numbered in succession of the Regular Army Divisions, which were not all active at its creation. Going into World War 2, the US Army Cavalry was contained 3 Regular (1st, 2nd, & 3rd), 4 National Guard (21st, 22nd, 23rd, & 24th), and 6 Organized Reserve (61st, 62nd, 63rd, 64th, 65th, & 66th) cavalry divisions as well as 1 independent cavalry brigade.
- 105th Cavalry Regiment
- 106th Cavalry Regiment
- 108th Cavalry Regiment
- 109th Cavalry Regiment
- 141st Field Artillery Regiment
Standard organization chart for a Cavalry Division in November 1940
- The 23rd Cavalry Division was geographically dispersed across the United States. The division was composed of personnel from the Alabama, Massachusetts, New Mexico, North Carolina, Tennessee, Texas, & Wisconsin National Guards.
- U.S. Army Order of Battle 1919–1941, Volume 2. The Arms: Cavalry, Field Artillery, and Coast Artillery, 1919–41 by Lieutenant Colonel (Retired) Steven E. Clay, Combat Studies Institute Press, Fort Leavenworth, KS, 2011
- Maneuver and Firepower, The Evolution of Divisions and Separate Brigades, by John B. Wilson, Center of Military History, Washington D.C., 1998
- Cavalry Regiments of the U S Army by James A. Sawicki Wyvern Pubns; June 1985
- , The Trading Post, Journal of the American Society of Military Insignia Collectors, April- June 2009, pages 20 & 21