| 66th Cavalry Division |
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66th Cavalry Division Shoulder Sleeve Insignia |
| Active | 1921-1942 |
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| Branch | Organized Reserve |
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The United States Army's 66th Cavalry Division of the Organized Reserve was created in the interwar period out of 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 II, the U.S. Army Cavalry contained three Regular, four National Guard, and six organized reserve cavalry divisions as well as one independent cavalry brigade, the 56th from Texas. The 66th Cavalry Division was never ordered to active duty during World War II, and the headquarters was disbanded on 30 January 1942
