Battle of Gettysburg order of battle: Union
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The Union order of battle during the Battle of Gettysburg includes the American Civil War officers and men of the Army of the Potomac (multiple commander names indicate succession of command during the three-day battle (July 1–3, 1863)). Order of battle compiled from the army organization during the battle,[1] the casualty returns[2] and the reports.[3]

Abbreviations used
Military rank
- MG = Major General
- BG = Brigadier General
- Col = Colonel
- Ltc = Lieutenant Colonel
- Maj = Major
- Cpt = Captain
- Lt = Lieutenant
- Sgt = Sergeant
Other
Army of the Potomac
MG George G. Meade, Commanding
General Staff and Headquarters
General Staff:
- Chief of Staff: MG Daniel Butterfield (w)
- Assistant Adjutant General: BG Seth Williams
- Assistant Inspector General: Col Edmund Schriver
- Chief Quartermaster: BG Rufus Ingalls
- Commissaries and subsistence: Col Henry F. Clarke
- Chief of Artillery: BG Henry J. Hunt (w)
- Chief Ordnance Officer: Cpt Daniel W. Flagler
- Chief Signal Officer: Cpt Lemuel B. Norton
- Medical Director: Maj Jonathan Letterman
- Chief of Engineers: BG Gouverneur K. Warren (w)
- Bureau of Military Information: Col George H. Sharpe
General Headquarters:
Command of the Provost Marshal General: BG Marsena R. Patrick[4]
- 93rd New York: Col John S. Crocker
- 8th United States (8 companies): Cpt Edwin W. H. Read
- 2nd Pennsylvania Cavalry: Col Richard Butler Price
- 6th Pennsylvania Cavalry (Companies E & I): Cpt James Starr
- Regular cavalry[5]
Guards and Orderlies:
- Oneida (New York) Cavalry: Cpt Daniel P. Mann
Engineer Brigade: BG Henry W. Benham[6]
- 15th New York Engineers (3 companies): Maj Walter L. Cassin
- 50th New York Engineers: Col William H. Pettes
- U.S. Battalion: Cpt George H. Mendell
I Corps
MG John F. Reynolds (k) [7]
MG Abner Doubleday[8]
MG John Newton
General Headquarters:
- 1st Maine Cavalry, Company L: Cpt Constantine Taylor
| Division | Brigade | Regiments and Others |
|---|---|---|
|
First Division |
1st Brigade
|
|
| 2nd Brigade |
| |
|
Second Division |
1st Brigade
|
|
| 2nd Brigade
|
| |
|
Third Division |
1st Brigade
|
|
| 2nd Brigade
|
| |
| 3rd Brigade[11]
|
| |
| Artillery Brigade |
|
II Corps
MG Winfield S. Hancock[12] (w)
BG John Gibbon
BG William Hays
General Headquarters:
- 6th New York Cavalry, Companies D and K: Cpt Riley Johnson (Escort)
- 53rd Pennsylvania Infantry, Companies A, B and K: Maj Octavus Bull (Provost Marshal 2nd Corps) [13]
| Division | Brigade | Regiments and Others |
|---|---|---|
|
First Division
|
1st Brigade
|
|
| 2nd Brigade
|
| |
| 3rd Brigade
|
| |
| 4th Brigade
|
| |
|
Second Division
|
1st Brigade
|
|
| 2nd Brigade
|
| |
| 3rd Brigade
|
| |
| unattached |
| |
|
Third Division |
1st Brigade |
|
| 2nd Brigade
|
| |
| 3rd Brigade
|
| |
| Artillery Brigade |
|
III Corps
MG Daniel E. Sickles (w)
MG David B. Birney (w)
| Division | Brigade | Regiments and Others |
|---|---|---|
|
First Division
|
1st Brigade
|
|
| 2nd Brigade
|
| |
| 3rd Brigade |
| |
| 1st Brigade [23]
|
| |
| 2nd Brigade |
| |
| 3rd Brigade |
| |
| Artillery Brigade
|
|
V Corps
MG George Sykes
General Headquarters:
- 12th New York Infantry (Companies D and E): Cpt Henry W. Ryder
- 17th Pennsylvania Cavalry, Companies D and H: Cpt William Thompson
| Division | Brigade | Regiments and Others |
|---|---|---|
|
|
1st Brigade |
|
| 2nd Brigade |
| |
| 3rd Brigade
|
| |
|
Second Division
|
1st Brigade
|
|
| 2nd Brigade
|
| |
| 3rd Brigade
|
| |
| 1st Brigade |
| |
| 3rd Brigade
|
| |
| Artillery Brigade |
|
VI Corps
General Headquarters:
- 1st New Jersey Cavalry, Company L and 1st Pennsylvania Cavalry, Company H: Cpt William S. Craft
| Division | Brigade | Regiments and Others |
|---|---|---|
|
First Division
|
1st Brigade |
|
| 2nd Brigade |
| |
| 3rd Brigade |
| |
| Provost Guard |
| |
|
Second Division [29]
|
2nd Brigade
|
|
| 3rd Brigade |
| |
|
Third Division
|
1st Brigade |
|
| 2nd Brigade
|
| |
| 3rd Brigade [30]
|
| |
| Artillery Brigade |
|
XI Corps
MG Oliver O. Howard[31]
MG Carl Schurz
General Headquarters:
- 1st Indiana Cavalry, Companies I and K: Cpt Abram Sharra
- 8th New York Infantry (1 company): Lt Hermann Foerster
| Division | Brigade | Regiments and Others |
|---|---|---|
|
First Division
|
1st Brigade
|
|
| 2nd Brigade
|
| |
|
Second Division
|
1st Brigade |
|
| 2nd Brigade
|
| |
|
Third Division
|
1st Brigade |
|
| 2nd Brigade |
| |
| Artillery Brigade
|
|
XII Corps
MG Henry W. Slocum[32]
BG Alpheus S. Williams
Provost Guard:
- 10th Maine Battalion (3 companies): Cpt John D. Beardsley
| Division | Brigade | Regiments and Others |
|---|---|---|
|
First Division
|
1st Brigade |
|
| 3rd Brigade
|
| |
|
Second Division
|
1st Brigade
|
|
| 2nd Brigade |
| |
| 3rd Brigade
|
| |
| Reporting directly | Lockwood's Brigade [34] |
|
| Artillery Brigade |
|
Cavalry Corps
Headquarter Guards:
- 1st Ohio Cavalry, Company A: Cpt Noah Jones (Second Division)
- 1st Ohio Cavalry, Company C: Cpt Samuel N. Stanford (Third Division)
| Division | Brigade | Regiments and Others |
|---|---|---|
|
First Division
|
1st Brigade
|
|
| 2nd Brigade
|
| |
| Reserve Brigade |
| |
|
Second Division [35] |
1st Brigade
|
|
| 3rd Brigade
|
| |
|
Third Division |
1st Brigade
|
|
| 2nd Brigade |
| |
| 1st Brigade |
| |
| 2nd Brigade [38]
|
|
Artillery Reserve
BG Robert O. Tyler
Cpt James M. Robertson
Headquarter Guard:
- 32nd Massachusetts Infantry, Company C: Cpt Josiah C. Fuller
| Brigade | Batteries |
|---|---|
| 1st Regular Brigade
|
|
| 1st Volunteer Brigade |
|
| 2nd Volunteer Brigade
|
|
| 3rd Volunteer Brigade
|
|
| 4th Volunteer Brigade
|
|
| Train Guard |
|