United States Army > Army of the Potomac
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Commanded by:
Major General John F. Reynolds (assigned temporary command of Army’s Left Wing 6/30)
Major General Abner Doubleday
As the 1st Corps moved north in pursuit of Lee on his invasion of Pennsylvania two brigades were dissolved in the 1st Division as regiments mustered out at the end of their terms. Stannard’s brigade of Vermont regiments from the Washington defences was attached to the 3rd Division, although it would not physically join the Corps until July 1. On June 30 General Reynolds was given command of the left wing of the Army of the Potomac, consisting of the 1st and 11th Corps. General Doubleday took temporary command of the 1st Corps, although Reynolds still accompanied the lead division.
| Headquarters Escort | ||
| 1st Maine Cavalry, Co. L | Captain Constantine Taylor | |
| First Division | Brigadier General John S. Wadsworth | |
| 1st Brigade | Colonel E. B. Fowler (to 6/13) Brigadier General Solomon Meredith |
original brigade dissolved 6/13 4 Brigade redesignated 1 Brigade 6/16 |
| 2nd Brigade | Brigadier General Lysander Cutler | |
| 3rd Brigade | Brigadier General Gabriel B. Paul |
brigade dissolved 6/16 |
| 4th Brigade | Brigadier General Solomon Meredith |
redesignated 1 Brigade 6/16 |
| Second Division | Brigadier General John C. Robinson | |
| 1st Brigade | Colonel S. H. Leonard (to 6/17) Brigadier General Gabriel B. Paul |
|
| 2nd Brigade | Brigadier General Henry Baxter | |
| Third Division | Major General Abner Doubleday (^ 6/30) Brigadier General Thomas A. Rowley |
|
| 1st Brigade | Brigadier General Thomas A. Rowley | |
| 2nd Brigade | Brigadier General Roy Stone | |
| Artillery | Colonel Charles Wainwright |
|
| 2nd Maine Battery | Captain James A. Hall | |
| 5th Maine Battery | Lieutenant Greenleaf T. Stevens | |
| 1st New York Artillery, Battery E | Captain John A. Reynolds | from 6 Corps, 2 Div.; temporarily attached to Battery L (below) |
| 1st New York Artillery, Battery L | Captain John A. Reynolds | from 1 Div. |
| 1st Pennsylvania Artillery, Battery B | Captain James H. Cooper | |
| 4th United States Artillery, Battery B | Lieutenant James Stewart | from 1 Div. |