The Armies at Gettysburg > The Army of the Potomac


Organization of the 1st corps of the Federal Army of the Potomac during the Civil War Battle of Gettysburg, July 1-3, 1863.

The 1st Corps had 34 infantry regiments and 5 artillery batteries. The infantry was organized into 3 divisions of either two or three brigades.  The five artillery batteries were organized in an artillery brigade.

At the beginning of the battle General Reynolds had been given temporary command of the left wing of the army, which included the the 1st as well as the 3rd and 11th Corps. General Doubleday as senior brigade commander took temporary command of 1st Corps. After Reynolds was killed on July 1 Doubleday continued to command the 1st Corps. When General Meade arrived on the field early on July 2 he transferred General Newton to command the 1st Corps. This returned Doubleday to division command and earned Meade his undying hatred.

1st Corps Headquarters Flag
The 1st Corps flag is a blue swallowtail with the corps number in red.

1st Corps (monument)
Major General John F. Reynolds (killed July 1) (monument)
Major General Abner Doubleday (relieved July 2) (monument)
Major General John Newton (after July 2)
strength: 12,220 men, 28 guns
casualties: 665 killed, 3,230 wounded, 2,160 missing, 6,055 total

1st Maine Cavalry, Company L
Captain Constantine Taylor


1st Division (monument)
Brigadier General James S. Wadsworth (monument)
strength: 3,860 men
casualties: 300 killed, 1,230 wounded, 625 missing, 2,155 total


2nd Division (monument)
Brigadier General John C. Robinson
strength: 3,000 men
casualties: 90 killed, 615 wounded, 985 missing, 1,690 total


3rd Division (monument)
Major General Abner Doubleday (monument)
Brigadier General Thomas Rowley (July 1-2)
strength: 4.700 men
casualties: 600 killed, 1,685 wounded, 830 missing, 3,115 total


Artillery Brigade (monument)
Colonel Charles S. Wainwright
strength: 600 men, 28 guns
casualties: 9 killed, 86 wounded, 10 missing, 105 total

2nd Maine Battery B (monument)
Captain James A. Hall
6 3″ Ordnance Rifles

5th Maine Battery E (monument)
Captain Greenleaf T. Stevens (wounded July 2)
Lieutenant Edward N. Whittier
6 Napoleons

1st Pennsylvania, Battery B (monument)
Captain James H. Cooper
4 3″ Ordnance Rifles

1st New York Batteries L & E (monument)
Captain Gilbert H. Reynolds (wounded July 1)
Lieutenant George Beck
6 3″ Ordnance Rifles

4th United States Battery B (monument)
1st Lieutenant James Stewart (wounded July 1)
1st Lieutenant James Davison (wounded July 1)
6 Napoleons