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TABLE 12
Divisions Active on 7 December 1941
| Component | Division | Date Activated or Inducted Into Federal Service | Location |
| RA | 1st Infantry | * | Fort Devens, Mass. |
| RA | 2d Infantry | * | Fort Sam Houston, Tex. |
| RA | 3d Infantry | * | Fort Lewis, Wash. |
| RA | 4th Infantry | 1 June 1940 | Fort Benning, Ga. |
| RA | 5th Infantry | 16 October 1939 | Fort Custer, Mich. |
| RA | 6th Infantry | 10 October 1939 | Fort Leonard Wood, Mo. |
| RA | 7th Infantry | 1 July 1940 | Fort Ord, Calif. |
| RA | 8th Infantry | 1 July 1940 | Fort Jackson, S.C. |
| RA | 9th Infantry | 1 August 1940 | Fort Bragg, N.C. |
| RA | 24th Infantry | * | Schofield Barracks, Hawaii |
| AUS | 25th Infantry | 1 October 1941 | Schofield Barracks, Hawaii |
| NG | 26th Infantry | 16 January 1941 | Camp Edwards, Mass. |
| NG | 27th Infantry | 15 October 1940 | Fort McClellan, Ala. |
| NG | 28th Infantry | 17 February 1941 | @Indiantown Gap Military Reservation, Pa. |
| NG | 29th Infantry | 3 February 1931 | @Fort George G. Meade, Md. |
| NG | 30th Infantry | 16 September 1940 | Fort Jackson, S.C. |
| NG | 31st Infantry | 23 November 1940 | Camp Blanding, Fla. |
| NG | 32d Infantry | 15 October 1940 | Camp Livingston, La. |
| NG | 33d Infantry | 5 March 1940 | Camp Forrest, Tenn. |
| NG | 34th Infantry | 10 February 1941 | Camp Claiborne, La. |
| NG | 35th Infantry | 23 December 1940 | Camp Joseph T. Robinson, Ark. |
| NG | 36th Infantry | 25 November 1940 | Camp Bowie, Tex. |
| NG | 37th Infantry | 16 October 1940 | Camp Shelby, Miss. |
| NG | 38th Infantry | 17 January 1941 | Camp Shelby, Miss. |
| NG | 40th Infantry | 3 March 1941 | Fort Lewis, Wash. |
| NG | 41st Infantry | 16 September 1940 | Fort Lewis, Wash. |
| NG | 43d Infantry | 24 February 1941 | Camp Shelby, Miss. |
| NG | 44th Infantry | 16 September 1940 | Fort Dix, N.J. |
| NG | 45th Infantry | 16 September 1940 | Camp Berkeley, Tex. |
| RA | 1st Cavalry | * | Fort Bliss, Tex. |
| RA | 2d Cavalry | 15 April 1941 | Fort Riley, Kans. |
| RA | 1st Armored | 15 July 1940 | Fort Knox, Ky. |
| RA | 2d Armored | 15 July 1940 | Fort Benning, Ga. |
| RA | 3d Armored | 15 April 1941 | Camp Beauregard, La. |
| RA | 4th Armored | 15 April 1941 | Pine Camp, N.Y. |
| RA | 5th Armored | 1 October 1941 | Camp Cooke, Calif. |
| NOTES: | *Active before 1 September 1939. |
| @En route from maneuvers, arrived at home station 9 December 1941. |
