U.S. Army

Department of the Rappahannock

Major General Irvin McDowell

Department created April 4, 1862, to consist of Virginia "east of the Blue Ridge and west of the Potomac River, the Fredericksburg and Richmond Railroad, including the District of Columbia and the country between the Potomac and the Petuxent Rivers." The First Army Corps was detached from the Army of the Potomac and used as the core of troops in the department.

First Division

Brigadier General W. B. Franklin

1st Brigade

Brigadier General P. Kearney

from Army of the Potomac
1st Corps, 1st Division

2nd Brigade

Brigadier General H. W, Slocum

3rd Brigade

Brigadier General J. Newton

Second Division

Brigadier General George McCall

1st Brigade

Brigadier General John F. Reynolds

from Army of the Potomac
1st Corps, 2nd Division

2nd Brigade

Brigadier General George Meade

3rd Brigade

Brigadier General Edward O. C. Ord

Third Division

Brigadier General Rufus King

1st Brigade

Brigadier General C. C. Augur

2nd Brigade

Brigadier General Marsena Patrick

3rd Brigade

Colonel Lysander Cutler