< to August • September 1862
Commanded by Major General John Pope (relieved September 3)
Discontinued and merged into the Army of the Potomac as the 1st, 11th and 12th Corps on September 12, 1862
First Corps |
Major General Franz Siegel | |
| First Division | Brigadier General Julius Stahel | to Army of the Potomac, 11th Corps |
| Second Division | Brigadier General Adolf Von Steinwehr | |
| Third Division | Brigadier General Carl Schurz | |
| Milroy’s Independent Brigade | Brigadier General R. Milroy | |
| Cavalry Brigade | Colonel John Beardsley | |
Second Corps |
Major General Nathaniel P. Banks | |
| First Division | Brigadier General Alpheus Williams (to 9/4) Brigadier General Samuel W. Crawford |
to Army of the Potomac, 12th Corps |
| Second Division | Brigadier General George S. Greene | |
| Cavalry Brigade | Brigadier General John Buford | |
Third Corps |
Major General Irvin McDowell (to 9/5) Brigadier General J. B. Ricketts (9/5 – 9/6) Major General Joseph Hooker |
|
| First Division | Brigadier General Abner Doubleday | to Army of the Potomac, 1st Corps |
| Second Division | Brigadier General John B. Ricketts | |
| Third Division | Brigadier General John F. Reynolds | |