June 1861 • to July >

Commanded by Brigadier General Irvin McDowell

The Department of Northeastern Virginia was created on May 27, 1861 to consist of that part of Virginia east of the Allegheny Mountains and north of the James River, except an area 60 miles around Fortress Monroe. Brigadier General Irvin McDowell formally took command May 28.

1st Division	Brigadier General Daniel Tyler*
First Brigade	Colonel Erasmus Keyes
Second Brigade	Brig. 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 Ambrose Burnside
3rd Division	Colonel Samuel P. Heintzelman
First Brigade	Colonel W. B. Franklin
Second Brigade	Colonel Orlando B. Wilcox
Third Brigade	Colonel Oliver O. Howard
Reserve Division	Colonel Dixon S. Miles
First Brigade	Colonel Louis Blenker
Second Brigade	Colonel T. Davies

*Tyler’s commission was in the Connecticut militia