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.
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.