United States Army > Army of the Potomac
March 1862 • to April >
Commanded by Major General Irvin McDowell
The 1st Corps was created March 3, 1862 and announced March 13, 1862.
| 1st Division | Brig. General William B. Franklin | |
| 1st Brigade | Brigadier General P. Kearney | |
| 2nd Brigade | Brigadier General H. W. Slocum | |
| 3rd Brigade | Brigadier General J. Newton | |
| 2nd Division | Brigadier General George A. McCall | |
| 1st Brigade | Brigadier General J. Reynolds | |
| 2nd Brigade | Brigadier General G. Meade | |
| 3rd Brigade | Brigadier General E. O. C. Ord | |
| 3rd Division | Brigadier General Rufus King | formerly McDowell’s Division |
| 1st Brigade | Brigadier General C. C. Augur | |
| 2nd Brigade | Brig. Gen. J. S. Wadsworth (to 3/17) Brigadier General M. Patrick |
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| 3rd Brigade | Colonel L. Cutler |