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.