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

Army of the Potomac (monument)
Major General George G. Meade (monument)
strength: 93,700 men, 372 guns
casualties: 3,150 killed, 14,500 wounded, 5,150 missing, 22,800 total

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

2nd Corps (monument)
Major General Winfield S. Hancock (wounded July 3) (monument)
Brigadier General John Gibbon (wounded July 3) (monument)
Brigadier General William Hays
strength: 11,350 men, 28 guns
casualties: 795 killed, 3,195 wounded, 380 missing, 4,370 total

3rd Corps (monument)
Major General Daniel E. Sickles (wounded July 2) (monument)
Major General David Birney 
strength: 13,000 men, 30 guns
casualties: 590 killed, 3,030 wounded, 590 missing, 4,210 total

5th Corps (monument)
Major General George Sykes (bio)
strength: 10,900 men, 26 guns
casualties: 365 killed, 1,610 wounded, 210 missing, 2,185 total

6th Corps (monument)
Major General John Sedgwick (bio) (monument)
strength: 13,600 men, 48 guns
casualties: 27 killed, 185 wounded, 30 missing, 242 total

11th Corps (monument)
Major General Oliver O. Howard (monument)
Major General Adolph Von Steinwehr
strength: 9,190 men, 26 guns
casualties: 370 killed, 1,920 wounded, 1,510 missing, 3,800 total

12th Corps (monument)
Major General Henry Slocum (bio) (monument)
strength: 10,700 men, 20 guns
casualties: 205 killed, 810 wounded, 65 missing, 1,080 total

Artillery Reserve (monument)
Brigadier General Robert O. Tyler 
strength: 2,375 men, 114 guns
casualties: 43 killed, 187 wounded, 12 missing, 242 total

Cavalry Corps (monument)
Major General Alfred Pleasonton
strength: 11,850 men, 52 guns
casualties: 85 killed, 325 wounded, 200 missing, 610 total

Provost Guard
Brigadier General Marsena R. Patrick
engaged strength: 1,750
casualties: 1 killed, 4 wounded

93rd New York Infantry (monument)
Colonel John S. Crocker

8th United States Infantry (monument)
Captain Edwin W.H. Read

2nd Pennsylvania Cavalry (monument)
Colonel Richard B. Price

6th Pennsylvania Cavalry, Company E (monument)
Captain Emlen N. Carpenter

6th Pennsylvania Cavalry, Company I (monument)
Captain James Starr

Oneida (New York) Cavalry (monument)
Captain Daniel P. Mann

Engineer Brigade (monument)
Brigadier General Henry W. Benham
Not present at Gettysburg; maintaining pontoon bridges across the Potomac

15th New York engineers, 3 companies (monument)
Major Walter L. Cassin

50th New York Engineers (monument)
Colonel William H. Pettis

United States Engineer Battalion (monument)
Captain George H. Mendell

1st Pennsylvania Cavalry Regiment (monument)
Colonel John P. Taylor

Major General Daniel, Butterfield Chief of Staff (wounded July 3)
Brigadier General Gouverneur K. Warren, Chief of Engineers (wounded July 2) (monument)
Brigadier General Seth Williams, Assistant Adjutant General
Brigadier General Rufus Ingalls, Quartermaster
Brigadier General Henry J. Hunt, Chief of Artillery (monument)
Colonel George H. Sharpe, Bureau of Information
Major Jonathan Letterman, Medical Director