U.S. Army

Department of Northeasten Virginia

Brigadier General Irvin McDowell

1st Division

Brigadier General Daniel Tyler

First Brigade

Bde. Gen. Erasmus Keyes

Second Brigade

Bde. Gen. R. C. Schenck

Third Brigade

Colonel William T. Sherman

Fourth Brigade

Colonel Israel Richardson

2nd Division

Colonel David Hunter

First Brigade

Colonel Andrew Porter

Second Brigade

Colonel Ambros Burnside

3rd Division

Colonel Samuel P. Heintzelman

First Brigade

Brigadier General W. B. Franklin

Second Brigade

Colonel O. B. Wilcox (w, c 7/21)

Colonel J. H. H. Ward (after 7/21)

Third Brigade

Colonel Oliver O. Howard

4th Division

Brigadier General Theodore Runyon

First Brigade

Second Brigade

5th Division

Colonel Dixon S. Miles

First Brigade

Colonel Louis Blenker

Second Brigade

Colonel T. Davies