The following Union Army units and commanders fought in the Battle of Antietam of the American Civil War. The Confederate order of battle is listed separately. Order of battle compiled from the army organizationMultiple commander names indicate command succession of command during the battle or the campaign. during the Maryland Campaign,Official Records, Series I, Volume XIX, Part 1, pages 169-180; Antietam National Battlefield-Army of the Potomac the casualty returnsOfficial Records, Series I, Volume XIX, Part 1, pages 189-204 and the reports.Official Records, Series I, Volume XIX, Part 1, pages 1111-1114, 1169-1171; Official Records, Series I, Volume LI, Part 1, pages 1312, 1391-1392
Abbreviations used
Military rank MG = Major General BG = Brigadier General Col = Colonel Ltc = Lieutenant Colonel Maj = Major Cpt = Captain Lt = Lieutenant
Other w = wounded mw = mortally wounded k = killed in action c = captured
Army of the Potomac
MG George McClellan
General Staff and Headquarters
General Staff Chief of Staff: BG Randolph B. Marcy Assistant Adjutant General: BG Seth Williams Inspector General: BG Delos B. Sackett Chief of Artillery: BG Henry J. Hunt Chief Quartermaster: Ltc Rufus Ingalls
General HeadquartersThe Volunteer Engineer Brigade (15th and 50th New York) under Brigadier General Daniel P. Woodbury detached at Washington, D. C.
Escort: Cpt James B. McIntyre Independent Company Oneida (New York) Cavalry: Cpt Daniel P. Mann 4th United States Cavalry, Company A: Lt Thomas H. McCormick 4th United States Cavalry, Company E: Cpt James B. McIntyre
U.S. Engineer Battalion: Cpt James C. Duane
Provost Guard:The composition of this command is not fully reported on the returns Maj William H. Wood 2nd United States Cavalry, Companies E, F, H, and K: Cpt George A. Gordon 8th United States, Companies A, D, F, and G: Cpt Royal T. Frank 19th United States, Company G: Cpt Edmund L. Smith 19th United States, Company H: Cpt Henry S. Welton
Headquarters Guard:Sturges (Illinois) Rifles detached at Washington, D. C. Maj Granville O. Haller 93rd New York: Ltc Benjamin C. Butler
Quartermaster's Guard: 1st United States Cavalry, Companies B, C, H, and I: Cpt Marcus A. Reno
I Corps
MG Joseph Hooker (w)
BG George G. MeadeAssigned to command of the I Corps, September 17, 1862 (see: Official Records, Series I, Volume XIX, Part 2, page 315)
Escort: 2nd New York Cavalry, Companies A, B, I and K: Cpt John E. Naylor
Division Brigade Regiments and OthersFirst Division
BG Abner Doubleday 1st Brigade
Col Walter Phelps, Jr. 22nd New York: Ltc John McKie, Jr. 24th New York: Cpt John D. O'Brian (w) 30th New York: Col William M. Searing 84th New York (14th Militia): Maj William H. de Bevoise (k) 2nd United States Sharpshooters: Col Henry A. V. Post (w) 2nd Brigade
Ltc William Hofmann 7th Indiana: Maj Ira G. Grover 76th New York: Cpt John W. Young 95th New York: Maj Edward Pye 56th Pennsylvania: Cpt Frederick Williams 3rd Brigade
BG Marsena R. Patrick 21st New York: Col William F. Rogers 23rd New York: Col Henry C. Hoffman 35th New York: Col Newton B. Lord 80th New York (20th Militia): Ltc Theodore B. Gates 4th Brigade
BG John Gibbon 19th Indiana: Ltc Alois O. Bachman (k), Cpt William W. Dudley 2nd Wisconsin: Ltc Thomas S. Allen (w), Cpt George B. Ely 6th Wisconsin: Ltc Edward S. Bragg (w), Maj Rufus R. Dawes 7th Wisconsin: Cpt John B. Callis Artillery
Cpt J. Albert Monroe New Hampshire Light, 1st Battery: Lt Frederick M. Edgell 1st Rhode Island Light, Battery D: Cpt J. Albert Monroe 1st New York Light, Battery L: Cpt John A. Reynolds 4th United States, Battery B: Cpt Joseph B. Campbell (w), Lt James StewartSecond Division
BG James B. RickettsFor Ricketts being wounded see: John H. Eicher and David J. Eicher, Civil War High Commands, page 453 (w) 1st Brigade
BG Abram Duryée 97th New York: Maj Charles B. Northrup 104th New York: Maj Lewis C. Skinner 105th New York: Col Howard Carroll (mw), Cpt John C. Whiteside 107th Pennsylvania: Cpt James McThomson 2nd BrigadeColonel Christian left his command without explanation, after which Colonel Peter Lyle took over command (see
Col William H. Christian
Col Peter Lyle 26th New York: Ltc Richard H. Richardson 94th New York: Ltc Calvin Littlefield 88th Pennsylvania: Ltc George W. Gile (w), Cpt Henry B. Myers 90th Pennsylvania: Col Peter Lyle (w), Ltc William A. Leech 3rd Brigade16th Maine detached as railroad guard
BG George L. Hartsuff (w)
Col Richard Coulter 12th Massachusetts: Maj Elisha Burbank (mw), Cpt Benjamin F. Cook 13th Massachusetts: Maj J. Parker Gould 83rd New York (9th Militia): Ltc William Atterbury 11th Pennsylvania: Col Richard Coulter, Cpt David M. Cook Artillery 1st Pennsylvania Light, Battery F: Cpt Ezra W. Matthews Pennsylvania Light, Battery C: Cpt James ThompsonThird Division
BG George G. Meade
BG Truman Seymour 1st Brigade
BG Truman Seymour
Col Richard Biddle Roberts 1st Pennsylvania Reserves: Col Richard Biddle Roberts, Cpt William C. Talley 2nd Pennsylvania Reserves: Cpt James N. Byrnes 5th Pennsylvania Reserves: Col Joseph W. Fisher 6th Pennsylvania Reserves: Col William Sinclair 13th Pennsylvania Reserves (1st Rifles): Col Hugh McNiel (k) Cpt Dennis McGee 2nd Brigade
Col Albert Magilton 3rd Pennsylvania Reserves: Ltc John Clark 4th Pennsylvania Reserves: Maj John Nyce 7th Pennsylvania Reserves: Maj Chauncey A. Lyman 8th Pennsylvania Reserves: Maj Silas M. Bailey 3rd Brigade
Ltc Robert Anderson 9th Pennsylvania Reserves: Cpt Samuel B. Dick 10th Pennsylvania Reserves: Ltc Adoniram J. Warner (w), Cpt Jonathan P. Smith 11th Pennsylvania Reserves: Ltc Samuel M. Jackson 12th Pennsylvania Reserves: Cpt Richard Gustin ArtilleryBattery G, 1st Pennsylvania Light Artillery detached at Washington, D. C. 1st Pennsylvania Light, Battery A: Lt John G. Simpson 1st Pennsylvania Light, Battery B: Cpt James H. Cooper 5th United States, Battery C: Cpt Dunbar R. Ransom
II Corps
MG Edwin V. Sumner
Escort: 6th New York Cavalry, Company D: Cpt Henry W. Lyon 6th New York Cavalry, Company K: Cpt Riley Johnson
Division Brigade Regiments and OthersFirst Division
MG Israel B. Richardson (mw)
BG John C. Caldwell
BG Winfield S. HancockAssigned to command of First Division, II Corps, September 17, 1862 (see: Official Records, Series I, Volume XIX, Part 2, page 316) 1st Brigade
BG John C. Caldwell 5th New Hampshire: Col Edward E. Cross (w) 7th New York: Cpt Charles Brestel 61st New York:Official Records, Series I, Volume XIX, Part 1, Page 172 ' Ltc Nelson A. Miles 64th New York: Col Francis C. Barlow (w), 81st Pennsylvania: Maj H. Boyd McKeen 2nd Brigade
BG Thomas F. Meagher (w)
Col John Burke 29th Massachusetts: Ltc Joseph H. Barnes 63rd New York: Col John Burke, Ltc Henry Fowler (w), Maj Richard C. Bentley (w), Cpt Joseph O'Neill 69th New York: Ltc James Kelly (w), Maj James Cavanagh 88th New York: Ltc Patrick Kelly 3rd Brigade
Col John R. Brooke 2nd Delaware: Cpt David L. Stricker 52nd New York: Col Paul Frank 57th New York: Ltc Philip S. Parisen (k), Maj Alford B. Chapman 66th New York: Cpt Julius Wehle 53rd Pennsylvania: Ltc Richards McMichael Artillery 1st New York Light, Battery B: Cpt Rufus D. Pettit 4th United States, Battery A and C: Lt Evan ThomasSecond Division
MG John Sedgwick (w)
BG Oliver O. Howard 1st Brigade
BG Willis A. Gorman 15th Massachusetts: Ltc John W. Kimball 1st Minnesota: Col Alfred Sully 34th New York: Col James A. Suitor 82nd New York (2nd Militia): Col Henry W. Hudson Massachusetts Sharpshooters, 1st Company: Cpt John Saunders (k) Minnesota Sharpshooters, 2nd Company: Cpt William F. Russell 2nd Brigade
BG Oliver O. Howard
Col Joshua T. Owen
Col DeWitt C. BaxterAssumed command after the brigade was reunited (see: Howard's report) 69th Pennsylvania: Col Joshua T. Owen 71st Pennsylvania: Col Isaac J. Wistar (w) 72nd Pennsylvania: Col DeWitt C. Baxter 106th Pennsylvania: Col Turner G. Morehead 3rd Brigade
BG Napoleon J. T. Dana (w)
Col Norman J. Hall 19th Massachusetts: Col Edward W. Hinks (w), Ltc Arthur F. Devereux (w), Cpt H. G. Weymouth 20th Massachusetts: Col William R. Lee 7th Michigan: Col Norman J. Hall, Cpt Charles J. Hunt 42nd New York: Ltc George N. Bomford (w), Maj James E. Mallon 59th New York: Col William L. Tidball Artillery 1st Rhode Island Light, Battery A: Cpt John A. Tompkins 1st United States, Battery I: Lt George A. WoodruffThird Division
BG William H. French 1st Brigade
BG Nathan Kimball 14th Indiana: Col William Harrow 4th Ohio: Col. John S. Mason 8th Ohio: Ltc Franklin Sawyer 132nd Pennsylvania: Col Richard A. Oakford (k), Ltc Vincent M. Wilcox 7th West Virginia: Col Joseph Snider 2nd Brigade
Col Dwight Morris 14th Connecticut: Ltc Sanford H. Perkins 108th New York: Col Oliver H. Palmer 130th Pennsylvania: Col Henry I. Zinn 3rd Brigade
BG Max Weber (w)
Col John W. Andrews 1st Delaware: Col John W. Andrews, Ltc Oliver Hopkinson (w) 5th Maryland: Maj Leopold Blumenberg (w), Cpt William W. Bamberger (w), Cpt Salome Marsh (w&c), Cpt Ernest F. M. Faehtz 4th New York: Ltc John D. MacGregor Unattached Artillery 1st New York Light, Battery G: Cpt John D. Frank 1st Rhode Island Light, Battery B: Cpt John G. Hazard 1st Rhode Island Light, Battery G: Cpt Charles D. Owen
IV Corps
Division Brigade Regiments and OthersFirst DivisionServed with the VI Corps; not engaged on September 17, 1862; assigned to the VI Corps as the Third Division September 26, 1862
MG Darius N. Couch 1st Brigade
BG Charles Devens 7th Massachusetts: Col David A. Russell 10th Massachusetts: Col Henry L. Eustis 36th New York: Col William H. Browne 2nd Rhode Island: Col Frank Wheaton 2nd Brigade
BG Albion P. Howe 62nd New York: Col David J. Nevin 93rd Pennsylvania: Col James M. McCarter 98th Pennsylvania: Col John F. Ballier 102nd Pennsylvania: Col Thomas A. Rowley 139th Pennsylvania:Joined September 17, 1862 Col Frank H. Collier 3rd Brigade
BG John Cochrane 65th New York: Col Alexander Shaler 67th New York: Col Julius W. Adams 122nd New York: Col Silas Titus 23rd Pennsylvania: Col Thomas H. Neill 31st Pennsylvania: Col George C. Spear 61st Pennsylvania: Col David H. Williams Artillery New York Light, 3rd Battery:The 3rd Battery New York Light Artillery transferred to First Division, IV Corps September 15, 1862 Cpt William Stuart 1st Pennsylvania Light, Battery C: Cpt Jeremiah McCarthy 1st Pennsylvania Light, Battery D: Cpt Michael Hall 2nd United States, Battery G: Lt John H. Butler
V Corps
MG Fitz John PorterIn reserve; only a portion of the corps engaged
Escort: 1st Maine Cavalry (detachment): Cpt George J. Summat
Division Brigade Regiments and OthersFirst Division
MG George W. Morell 1st Brigade
Col James Barnes 2nd Maine: Col Charles W. Roberts 18th Massachusetts: Ltc Joseph Hayes 22nd Massachusetts: Ltc William S. Tilton 1st Michigan: Cpt Emory W. Belton 13th New York: Col Elisha Marshall 25th New York: Col Charles A. Johnson 118th Pennsylvania: Col Charles M. Prevost Massachusetts Sharpshooters, 2nd Company: Cpt Lewis E. Wentworth 2nd Brigade
BG Charles Griffin 2nd District of Columbia: Col Charles M. Alexander 9th Massachusetts: Col Patrick R. Guiney 32nd Massachusetts: Col Francis J. Parker 4th Michigan: Col Jonathan W. Childs 14th New York: Col James McQuade 62nd Pennsylvania: Col Jacob B. Sweitzer 3rd Brigade
Col T.B.W. Stockton 20th Maine: Col Adelbert Ames 16th Michigan: Ltc Norval E. Welch 12th New York: Cpt William Huson 17th New York: Ltc Nelson B. Bartram 44th New York: Maj Freeman Conner 83rd Pennsylvania: Cpt Orpheus S. Woodward Michigan Sharpshooters, Brady's Company: Lt Jonas H. Titus Jr. Artillery Massachusetts Light, Battery C: Cpt Augustus P. Martin 1st Rhode Island Light, Battery C: Cpt Richard Waterman