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.
First Division |
Brigadier General Daniel Tyler** | |
| First Brigade | Colonel Erasmus Keyes | |
| 2nd Maine Infantry Regiment | Colonel Charles D. Jameson | from Maine via New York |
| 1st Connecticut Infantry Regiment | Lieutenant Colonel Speidel | from Dept. Washington 6/24 |
| 2nd Connecticut Infantry Regiment | Colonel A. H. Terry | from Dept. Washington 6/24 |
| 3rd Connecticut Infantry Regiment | Colonel J. Chatfield | from Dept. Washington 6/24 |
| Varian’s New York Battery | Captain J. Varian | from Annapolis, Md. |
| Second Brigade | Brigadier General Robert C. Schenck** | |
| 1st Ohio Infantry Regiment | Colonel A. McCook | from Dept. Washington |
| 2nd Ohio Infantry Regiment | Colonel L. Wilson | from Dept. Washington |
| 2nd New York State Militia | Colonel G. W. B. Tompkins | from New York 5/18; mustered in 5/28 |
| New York Artillery, Battery B | Captain Thaddeus P. Mott | from 2nd NYSM (above) |
| 2nd United States Artillery, Battery E | Captain Carlisle | from Regular Army |
| Third Brigade | Colonel W. T. Sherman | |
| 13th New York Infantry Regiment | Colonel Isaac F. Quinby | arrived 6/1 from New York |
| 69th New York State Militia | Colonel Michael Corcoran | from Dept. Washington |
| 79th New York Infantry Regiment | Colonel J. Cameron | arrived 6/3 from New York |
| 2nd Wisconsin Infantry Regiment | Colonel P. S. Coon | arrived 6/25 from Wisconsin |
| 3rd United States Artillery, Battery E | Captain Ayers | from Regular Army |
| Fourth Brigade | Colonel Israel Richardson | |
| 1st Massachusetts Infantry Regiment | Colonel R. Cowdin | arrived 6/17 from Massachusetts |
| 12th New York Infantry Regiment | Colonel E. L. Walrath | arrived 6/1 from New York |
| 2nd Michigan Infantry Regiment | Major A. W. Williams | arrived 6/10 from Michigan |
| 3rd Michigan Infantry Regiment | Colonel D. McConnel | arrived 6/16 from Michigan |
| 1st United States Artillery, Battery G | Lieutenant J. Edwards | from Regular Army |
| 2nd United States Artillery, Battery M | Captain H. J. Hunt | from Regular Army |
2nd Division |
Colonel David Hunter | |
| First Brigade | Colonel Andrew Porter | |
| 8th New York State Militia | Colonel G. Lyons | from Dist. Washington |
| 14th New York State Militia | Colonel A. M. Wood | from Dist Washington |
| 2nd United States Infantry, Cos. C & K 3rd U.S., Cos. B, D, G, H & K 8th U. S., Co. G |
Major George Sykes | from Regular Army |
| 1st United States Cavalry, Cos. A & E 2nd U. S. Dragoons, Co. K 2nd U. S. Cavalry, Cos. B, E, G & I |
Major I. N. Palmer | from Regular Army |
| United States Marine Battalion | Major J. G. Reynolds | from United States Navy |
| Second Brigade | Colonel Ambrose Burnside | |
| 2nd New Hampshire Infantry Regiment | Colonel G. Marston | from New Hampshire 6/20 |
| 1st Rhode Island Infantry Regiment | Major J. P. Balch | from Dist. Washington June |
| 2nd Rhode Island Infantry Regiment | Colonel J. S. Slocum | from Rhode Island 6/19 |
| 1st Rhode Island Artillery, Battery A | Captain William H. Reynolds | from Rhode Island 6/19 |
| 71st New York Infantry Regiment | Colonel H. P. Martin | from Dist. Washington June |
3rd Division |
Colonel Samuel P. Heintzelman | |
| First Brigade | Colonel William B. Franklin | |
| 11th Massachusetts Infantry Regiment | Colonel G. Clark | from Massachusetts 6/26 |
| 4th Pennsylvania Infantry Regiment | Colonel John Hartranft | from Dept. Washington 6/3 |
| 5th Pennsylvania Infantry Regiment | Colonel R. P. McDowell | from Dept. Washington 6/3 |
| 1st United States Artillery, Battery I | Captain J. B. Ricketts | from Regular Army |
| Second Brigade | Colonel Orlando B. Wilcox | |
| 38th New York Infantry Regiment | Colonel J. H. Ward | from New York 6/19 |
| 1st Michigan Infantry Regiment | Major A. F. Bidwell | from Dist. Washington |
| 4th Michigan Infantry Regiment | Colonel D. A. Woodbury | from Michigan 6/26 |
| 2nd United States Artillery, Battery D | Captain R. Arnold | from Regular Army |
| Third Brigade | Colonel Oliver O. Howard | |
| 3rd Maine Infantry Regiment | Major H. G. Staples | from Maine 6/4 |
| 4th Maine Infantry Regiment | Colonel H. G. Berry | from Maine 6/20 |
| 5th Maine Infantry Regiment | Colonel M. H. Dunnell | from Maine 6/26 |
| 2nd Vermont Infantry Regiment | Colonel H. Whiting | from Vermont 6/24 |
Reserve Division |
Colonel Dixon S. Miles | |
| First Brigade | Colonel Louis Blenker | |
| 8th New York Infantry Regiment | Lieutenant Colonel J. Stahel | from New York 5/26 |
| 29th New York Infantry Regiment | Colonel Adolph Von Steinwehr | from New York 6/21 |
| 39th New York Infantry Regiment | Colonel Frederick G. D’Utassy | from New York 6/1 |
| 2nd United States Artillery, Battery A | Captain J. C. Tidball | from Regular Army |
| Second Brigade | Colonel T. Davies | |
| 16th New York Infantry Regiment | Lieutenant Colonel S. Marsh | from New York 6/29 |
| 18th New York Infantry Regiment | Colonel William A. Jackson | from New York 6/21 |
| 31st New York Infantry Regiment | Colonel Calvin E. Pratt | from New York 6/26 |
| 2nd United States Artillery, Battery G | Lieutenant O. D. Greene | from Regular Army |
*Commission in the United States Volunteers
**Commission in the militia