June 1861 • to July >
Commanded by 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 |