Battle of Gettysburg order of battle: Union

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,Official Records, Series I, Volume XXVII, Part 1, pages 155-168; Gettysburg National Military Park-Army of the Potomac the casualty returnsOfficial Records, Series I, Volume XXVII, Part 1, pages 173-187 and the reports.Official Records, Series I, Volume XXVII, Part 1, pages 5-14

Abbreviations used

Military rank MG = Major General BG = Brigadier General Col = Colonel Ltc = Lieutenant Colonel Maj = Major Cpt = Captain Lt = Lieutenant Sgt = Sergeant

Other w = wounded mw = mortally wounded k = killed c = captured m = missing

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. Patrick93rd New York and 8th United States not engaged 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 cavalrydetachments from 1st, 2nd, 5th, and 6th Regiments

Guards and Orderlies: Oneida (New York) Cavalry: Cpt Daniel P. Mann

Engineer Brigade: BG Henry W. Benhamnot engaged. With the exception of the regular battalion, it was July 1, and while at Beaver Dam Creek (Maryland), ordered to Washington D.C., where it arrived July 3. 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) Major General Reynolds was killed July 1, while in command of the left wing of the army (I, III, and XI Corps and First Division, Cavalry Corps)

MG Abner DoubledayMajor General Doubleday commanded the Corps July 1, and Major General Newton, who was assigned to that command on the 1st , superseded him July 2

MG John Newton

General Headquarters: 1st Maine Cavalry, Company L: Cpt Constantine Taylor

DivisionBrigade Regiments and OthersFirst Division

BG James S. Wadsworth 1st Brigade

BG Solomon Meredith (w)

Col William W. Robinson 19th Indiana: Col Samuel J. Williams (w), Ltc William W. Dudley (w), Maj John M. Lindley (w) 24th Michigan: Col Henry A. Morrow (w&c), Ltc Mark Flanigan (w), Maj Edwin B. Wight (w), Cpt Albert M. Edwards 2nd Wisconsin: Col Lucius Fairchild (w&c), Ltc George H. Stevens (mw), Maj John Mansfield (w), Cpt George H. Otis 6th Wisconsin: Ltc Rufus Dawes, Maj John F. Hauser 7th Wisconsin: Col William W. Robinson, Ltc John B. Callis (w&c), Maj Mark Finnicum (w) 2nd Brigade

BG Lysander Cutler 7th Indiana: Col Ira G. Grover 76th New York: Maj Andrew J. Grover (k, July 1), Cpt John E. Cook (w) 84th New York (14th Militia): Col Edward B. Fowler (w) Ltc R. B. Jordan (w) 95th New York: Col George H. Biddle (w, July 1), Maj Edward Pye 147th New York: Ltc Francis C. Miller (w), Maj George Harney 56th Pennsylvania (9 companies): Col William HofmannSecond Division

BG John C. Robinson 1st Brigade

BG Gabriel R. Paul (w)

Col Samuel H. Leonard (w)

Col Adrian R. Root (w&c)

Col Richard Coulter (w)

Col Peter Lyle

Col Richard Coulter 16th Maine: Col Charles W. Tilden (c), Cpt Daniel Marston 13th Massachusetts: Col Samuel H. Leonard, Ltc Nathaniel W. Batchelder 94th New York: Col Adrian R. Root (w/c, July 1), Maj Samuel A. Moffett 104th New York: Col Gilbert G. Prey, Ltc Henry Tuthill (w) 107th Pennsylvania: Ltc James McThomson (w, July 1), Cpt Emanuel D. Roath 2nd Brigade

BG Henry Baxter 12th Massachusetts: Col James L. Bates (w), Ltc David Allen, Jr. 83rd New York (9th Militia): Ltc Joseph A. Moesch 97th New York: Col Charles Wheelock (w & c, July 1), Ltc John P. Spofford (c) Maj Charles B. Northrup 11th Pennsylvania:transferred, in afternoon of July 1, to the First Brigade Col Richard Coulter, Cpt Benjamin F. Haines (w), Cpt John B. Overmyer 88th Pennsylvania: Maj Benezet F. Foust (w, July 1), Cpt Edmund A. Mass (c), Cpt Henry Whiteside 90th Pennsylvania: Col Peter Lyle,temporarily transferred to the First Brigade Maj Alfred J. SellersThird Division

MG Abner Doubleday

BG Thomas A. Rowley      1st Brigade

Col Chapman Biddle (w)

BG Thomas A. Rowley (w) 80th New York (20th Militia): Col Theodore B. Gates, Maj Walter A. Van Rensselaer (w) 121st Pennsylvania: Col Chapman Biddle, Maj Alexander Biddle 142nd Pennsylvania: Col Robert P. Cummins (mw), Ltc Alfred B. McCalmont, Maj Horatio N. Warren 151st Pennsylvania: Ltc George F. McFarland (w), Cpt Walter L. Owens, Col Harrison Allen 2nd Brigade

Col Roy Stone (w)

Col Langhorne Wister (w)

Col Edmund L. Dana 143rd Pennsylvania: Col Edmund L. Dana, Ltc John D. Musser (w) 149th Pennsylvania: Ltc Walton Dwight (w), Cpt James Glenn 150th Pennsylvania: Col Langhorne Wister, Ltc Henry S. Huidekoper (w), Maj Thomas Chamberlin (w), Cpt Cornelius C. Widdis (c), Cpt George W. Jones 3rd Brigadearrived on the evening of July 1 and did not take part on the first day of the battle ; 12th Vermont and 15th Vermont were detached as train guard

BG George J. Stannard (w)

Col Francis V. Randall 13th Vermont: Col Francis V. Randall, Ltc William D. Munson (w), Maj Joseph J. Boynton 14th Vermont: Col William T. Nichols, Ltc Charles W. Rose 16th Vermont: Col Wheelock G. Veazey, Maj William Rounds Artillery Brigade

Col Charles S. Wainwright Maine Light, 2nd Battery (B): Cpt James A. Hall Maine Light, 5th Battery (E): Cpt Greenlief T. Stevens (w), Lt Edward N. Whittier 1st New York Light, Battery E & Battery L: Cpt Gilbert H. Reynolds (w, July 1), Lt George Breck 1st Pennsylvania Light, Battery B: Cpt James H. Cooper 4th United States, Battery B: Lt James Stewart (w), Lt James Davison (w)

II Corps

MG Winfield S. HancockAfter the death of General Reynolds, General Hancock was assigned to the command of all troops on the field of battle , relieving General Howard, who had succeeded General Reynolds. General Gibbon, of the Second Division, assumed command of the corps. These assignments terminated on the evening of July 1. Similar changes in commanders occurred during the battle of the 2nd, when General Hancock was put in command of the Third Corps in addition to that of his own. He was wounded on the 3rd, and Brigadier General William Hays was assigned to the command of the corps. (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) under the command of General Patrick (Provost Marshal General of the Army) during the battle

DivisionBrigade Regiments and OthersFirst Division

BG John C. Caldwell 1st Brigade

Col Edward E. Cross (mw)

Col H. Boyd McKeen 5th New Hampshire: Ltc Charles E. Hapgood, Maj Richard E. Cross 61st New York: Ltc K. Oscar Broady 81st Pennsylvania: Col Henry Boyd McKeen, Ltc Amos Stroh 148th Pennsylvania: Col H. Boyd McKeen,Col McKeen was placed in temporary command of the 148th Pennsylvania Infantry because Colonel James Addams Beaver was ill. Col Edward E. Cross believed that Ltc McFarlane was too inexperienced to lead the regiment. Ltc Robert McFarlane, Maj Robert H. Foster 2nd Brigade

Col Patrick Kelly 28th Massachusetts: Col Richard Byrnes 63rd New York Infantry (2 companies): Ltc Richard C. Bentley (w), Cpt Thomas Touhy 69th New York (2 companies): Cpt Richard Moroney (w), Lt James J. Smith 88th New York Infantry (2 companies): Cpt Denis F. Burke 116th Pennsylvania (4 companies): Maj St. Clair A. Mulholland 3rd Brigade

BG Samuel K. Zook (mw July 2)

Ltc Charles G. Freudenberg (w July 2)

Col Richard P. Roberts (k)

Ltc John Fraser 52nd New York: Ltc Charles G. Freudenberg (w July 2), Maj Edward Venuti (k), Cpt William Scherrer 57th New York: Ltc Alford B. Chapman 66th New York: Col Orlando H. Morris (w), Ltc John S. Hammell (w), Maj Peter A. Nelson 140th Pennsylvania: Col Richard P. Roberts, Ltc John Fraser, Maj Thomas Rodgers 4th Brigade

Col John R. Brooke (w) 27th Connecticut (2 companies): Ltc Henry C. Merwin (k), Maj James H. Coburn 2nd Delaware: Col William P. Bailey (w July 2), Ltc David L. Stricker (w July 2), Cpt Charles H. Christman 64th New York: Col Daniel G. Bingham (w), Maj Leman W. Bradley (w) 53rd Pennsylvania: Ltc Richards McMichael 145th Pennsylvania (7 companies): Col Hiram Loomis Brown (w July 2), Cpt John W. Reynolds (w July 2), Cpt Moses W. OliverSecond Division

BG John Gibbon (w)

BG William Harrow 1st Brigade

BG William Harrow

Col Francis E. Heath (w) 19th Maine: Col Francis E. Heath, Ltc Henry W. Cunningham 15th Massachusetts: Col George H. Ward (mw), Ltc George C. Joslin, Maj Isaac H. Hooper 1st Minnesota:2nd Company Minnesota Sharpshooters attached Col William Colvill, Jr. (w), Cpt Nathan S. Messick (k), Cpt Henry C. Coates 82nd New York (2nd Militia): Ltc James Huston (mw), Maj Thomas W. Baird (w), Cpt John Darrow 2nd Brigade

BG Alexander S. Webb (w) 69th Pennsylvania: Col Dennis O'Kane (mw), Ltc Martin Tschudy (k), Maj James M. Duffy (w), Cpt William Davis 71st Pennsylvania: Col Richard P. Smith, Ltc Charles Kochersperger 72nd Pennsylvania: Col De Witt C. Baxter (w), Ltc Theodore Hesser, Maj Samuel Roberts 106th Pennsylvania: Ltc William L. Curry, Maj John H. Stover 3rd Brigade

Col Norman J. Hall 19th Massachusetts: Col Arthur F. Devereux, Ltc Ansel D. Wass (w), Maj Edmund Rice (w) 20th Massachusetts: Col Paul Joseph Revere (mw), Ltc George N. Macy (w), Cpt Henry L. Abbott 7th Michigan: Ltc Amos E. Steele (k), Maj Sylvanus W. Curtiss 42nd New York: Col James E. Mallon 59th New York (4 companies): Ltc Max A. Thoman (mw), Cpt William McFadden unattached Massachusetts Sharpshooters, 1st Company: Cpt William Plumer, Lt Emerson L. BicknellThird Division

BG Alexander Hays 1st Brigade

Col Samuel S. Carroll 14th Indiana: Col John Coons, Ltc Elijah H. C. Cavins, Maj William Houghton 4th Ohio: Ltc Leonard W. Carpenter, Maj Gordon A. Stewart 8th Ohio: Ltc Franklin Sawyer (w) 7th West Virginia: Ltc Jonathan H. Lockwood (w) 2nd Brigade

Col Thomas A. Smyth (w)

Ltc Francis E. Pierce 14th Connecticut: Maj Theodore G. Ellis 1st Delaware: Ltc Edward P. Harris,arrested by Hancock on July 2; restored on July 4 Cpt Thomas B. Hizar (w), Lt William Smith (k), Lt John T. Dent 12th New Jersey: Maj John T. Hill 10th New York (battalion): Maj George F. Hopper served as Provost Guard during the battle 108th New York: Ltc Francis E. Pierce 3rd Brigade

Col George L. Willard (k)

Col Eliakim Sherrill arrested by Hancock; released July 3 upon application by Hays and MacDougall

Ltc James M. Bull

Col Clinton D. MacDougall (w)

Col Eliakim Sherrill (mw, July 3) 39th New York (4 companies): Maj Hugo Hildebrandt (w) 111th New York: Col Clinton D. MacDougall, Ltc Isaac M. Lusk (w), Cpt Aaron P. Seeley 125th New York: Ltc Levin Crandell 126th New York: Col Eliakim Sherrill, Ltc James M. Bull Artillery Brigade

Cpt John G. Hazard 1st New York Light, Battery B:Transferred from Artillery Reserve, July 1; 14th New York Battery attached Cpt James M. Rorty (k), Lt Albert S. Sheldon (w), Lt Robert E. Rogers