< to May • June 1861 • to July >
Commanded by:
Brigadier General Milledge L. Bonham (to June 2)
General Pierre Gustave Toutant Beauregard (arrived at Manasses to take command June 2)
General Beauregard was ordered “to the command of the troops in the Alexandria line” under Special Orders No. 149. On June 20 Beauregard ordered his command to be organized into six brigades as the “First Corps, Army of the Potomac.”
| First Brigade | Brigadier General Milledge L. Bonham | |
| 1st South Carolina Infantry Regiment | Colonel Maxcy Gregg | |
| 2nd South Carolina Infantry Regiment | Colonel Joseph B. Kershaw | |
| 3rd South Carolina Infantry Regiment | Colonel James H. Williams | from Richmond 6/22 |
| 7th South Carolina Infantry Regiment | Colonel Thomas G. Bacon | from Richmond 6/4 |
| 8th South Carolina Infantry Regiment | Colonel Ellerbe Boggan Crawford Cash | from Richmond 6/15 |
| Alexandria (Va.) Battery | Captain Delaware Kemper | |
| 1st Company Richmond Howitzers | Captain John C. Shields | |
| 30th Virginia Cavalry (-) | Colonel R.C.W. Radford | |
| Munford’s Cavalry Squadron | Lieutenant Colonel Thomas T. Munford | |
| Second Brigade | Colonel Richard S. Ewell (to B.G. 6/17) | |
| 5th Alabama Infantry Regiment | Colonel Robert E. Rodes | from Richmond 6/19 |
| 6th Alabama Infantry Regiment | Colonel John J. Seibels | from Lynchburg 6/15 |
| 6th Louisiana Infantry Regiment | Colonel Isaac G. Seymour | from Richmond 6/14 & 16 |
| Washington Artillery, 1st Company | Captain Thomas L. Rosser | from Richmond 6/25 |
| Cavalry Battalion | Lieutenant Colonel Wiliam H. Jenifer | |
| Third Brigade | Colonel David R. Jones (to B.G. 6/17) | |
| 17th Mississippi Infantry Regiment | Colonel Winfirld S. Featherston | |
| 18th Mississippi Infantry Regiment | Colonel Erasmus R. Burt | |
| 5th South Carolina Infantry Regiment | Colonel Micah Jenkins | |
| Appomattox Rangers, 30th Va. Cav. | Captain Joel W. Flood | |
| Washington Artillery, 2nd Company | Captain Merrit B. Miller | from Richmond 6/25 |
| Fourth Brigade | Colonel G. H. Terrett | |
| 5th North Carolina State Troops | Lieutenant Colonel J.P. Jones | |
| 1st Virginia Infantry Regiment | Colonel Patrick T. Moore | |
| 11th Virginia Infantry Regiment | Colonel Samuel Garland | |
| 17th Virginia Infantry Regiment | Colonel Montgomery D. Corse | |
| Washington Artillery, 3rd Company | Lieutenant John J. Garnett | |
| Amhearst Rangers, 30th Va. Cav. | Captain Edgar Whitehead | |
| Fifth Brigade | Colonel Philip St. George Cocke | |
| 8th Virginia Infantry Regiment | Colonel Eppa Hunton | |
| 18th Virginia Infantry Regiment | Colonel Robert E. Withers | |
| 19th Virginia Infantry Regiment | Lieutenant Colonel John B. Strange | |
| 28th Virginia Infantry Regiment | Colonel Robert T. Preston | |
| 49th Virginia Infantry Regiment (3 cos.) | Colonel William Smith | |
| Schaeffer’s Virginia Infantry Battalion | Captain F. B. Schaeffer | |
| Loudon (Va.) Battery | Captain Arthur L. Rogers | |
| Lynchburg (Va.) Artillery | Captain H. G. Latham | |
| Wise Troop, 30th Va. Cav. | Captain John S. Langhorne | |
| Franklin (Va.) Rangers | Captain G. W. H. Hale | |
| Bedford Southside Dragoons, 30th Va. Cav. Co. F | Captain J. Wilson | |
| Sixth Brigade | Colonel Jubal A. Early | |
| 7th Louisiana Infantry Regiment | Colonel Harry T. Hays | |
| 7th Virginia Infantry Regiment | Colonel James L. Kemper | |
| 24th Virginia Infantry Regiment | Lieutenant Colonel Peter Hairston | |
| Washington Artillery, 4th Company | Lieutenant Charles W. Squire | |
| Reserve Brigade | Brigadier General Theophilus Holmes | |
| 1st Arkansas Infantry Regiment | Colonel James F. Fagan | |
| 2nd Tennessee Infantry Regiment | Colonel William Bate | |
| Purcell (Va.) Artillery | Captain R. Lindsay Walker | |
| Camp Pickens Battery | Captain Sterrett, C.S. Navy | |
| Evan’s Command | Colonel Nathan G. Evans | |
| 2nd Louisiana Battalion | Major Chatham R. Wheat | |
| 4th South Carolina Infantry Regiment | Colonel J.B.E. Sloan | |
| Campbell Rangers, 30th Va. Cav. | Captain John D. Alexander | |
| Clay Dragoons, 30th Va. Cav. Co. A | Captain William R. Terry | |
| Davidson’s (Va.) Battery | Lieutenant G. S. Davidson | |
| Alexandria, VA Militia | Lt. Colonel A. S. Taylor | |
| Alexandria Riflemen | Captain M. Marye | to 17th VA 6/10 |
| Mount Vernon Guards | Captain S.H. DeVaughn |