Antietam Union order of battle

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.

1 Abbreviations used
- 1.1 Military rank
- 1.2 Other
2 Army of the Potomac
3 References

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
c = captured

Army of the Potomac

MG George McClellan

Chief of Staff: BG Randolph B. Marcy
Volunteer Engineer Brigade: BG Daniel Phineas Woodbury
Inspector General: BG Delos B. Sackett

I Corps

MG Joseph Hooker (w)
BG George Meade
Escort:
2nd New York Cavalry (4 companies): Cpt John E. Naylor

Division	Brigade	Regiments and Others
First Division BG Abner Doubleday	1st Brigade (Eastern Iron 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 New York State Militia): Maj William H. de Bevoise 2nd U.S. Sharpshooters: Col Henry A. V. Post (w)
	2nd Brigade Ltc J. 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 New York State Militia): Ltc Theodore B. Gates
	4th Brigade (Iron 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	1st New Hampshire Battery: Lt Frederick M. Edgell Battery D, 1st Rhode Island: Cpt John Albert Monroe Battery L, 1st New York: Cpt John A. Reynolds Battery B, 4th U.S.: Cpt Joseph B. Campbell (w), Lt James Stewart
Second Division BG James B. Ricketts	1st Brigade BG Abram Duryée	97th New York: Maj Charles Northrup 104th New York: Maj Lewis C. Skinner 105th New York: Col Howard Carroll (mw) 107th Pennsylvania: Cpt James MacThomson
	2nd Brigade Col William A. Christian Col Peter Lyle (w)	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, Ltc William A. Leech
	3rd Brigade 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 New York State Militia): Ltc William Atterbury 11th Pennsylvania: Col Richard Coulter, Cpt David M. Cook
	Artillery	Battery F, 1st Pennsylvania Light Artillery: Cpt Ezra W. Matthews Battery C, Pennsylvania Light Artillery: Cpt James Thompson
Third Division (Pennsylvania Reserves) BG George Meade BG Truman Seymour	1st Brigade BG Truman Seymour Col R. Biddle Roberts	1st Pennsylvania: Col R. Biddle Roberts, Cpt William C. Talley 2nd Pennsylvania: Cpt James N. Byrnes 5th Pennsylvania: Col Joseph W. Fisher 6th Pennsylvania: Col William Sinclair 13th Pennsylvania (1st Rifles): Col Hugh W. McNeil (k, 9/16), Cpt Dennis McGee
	2nd Brigade Col Albert L. Magilton	3rd Pennsylvania: Ltc John Clark 4th Pennsylvania: Maj John Nyce 7th Pennsylvania: Maj Chauncey A. Lyman 8th Pennsylvania: Maj Silas M. Bailey
	3rd Brigade Col Thomas F. Gallagher (w) Ltc Robert Anderson	9th Pennsylvania: Ltc Robert Anderson, Cpt Samuel B. Dick 10th Pennsylvania: Ltc Adoniram J. Warner (w), Cpt Jonathan P. Smith 11th Pennsylvania: Ltc Samuel M. Jackson 12th Pennsylvania: Cpt Richard Gustin
	Artillery	Battery A, 1st Pennsylvania Light Artillery: Lt John G. Simpson Battery B, 1st Pennsylvania Light Artillery: Capt James H. Cooper Battery C, 5th U.S.: 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 Others
First Division MG Israel B. Richardson (mw) BG John C. Caldwell BG Winfield S. Hancock	1st Brigade BG John C. Caldwell	5th New Hampshire: Col Edward E. Cross (w) 7th New York: Cpt Charles Brestel 61st and 64th New York: Col Francis C. Barlow (w), Ltc Nelson A. Miles 81st Pennsylvania: Maj H. Boyd McKeen
	2nd Brigade (Irish 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, Capt Julius Wehle, LtCol James H. Bull 53rd Pennsylvania: Ltc Richards McMichael
	Artillery	Battery B, 1st New York: Cpt Rufus D. Pettit Battery A and C, 4th U.S.: Lt Evan Thomas
Second 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 New York State Militia): Col Henry W. Hudson 1st Company Massachusetts Sharpshooters: Cpt John Saunders (k) 3rd Company Minnesota Sharpshooters: Cpt William F. Russell
	2nd Brigade (Philadelphia Brigade) BG Oliver O. Howard Col Joshua T. Owen Col DeWitt C. Baxter	69th Pennsylvania: Col Joshua T. Owen 71st Pennsylvania: Col Isaac J. Wistar (w), Lt Richard P. Smith, Cpt Enoch E. Lewis 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	Battery A, 1st Rhode Island: Cpt John A. Tompkins Battery I, 1st U.S.: Lt George A. Woodruff
Third Division MG William H. French	1st Brigade BG Nathan Kimball	14th Indiana: Col William Harrow 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 Ernest F. M. Faehtz 4th New York: Ltc John D. MacGregor
	Unattached Artillery	Battery G, 1st New York: Cpt John D. Frank Battery B, 1st Rhode Island: Cpt John G. Hazard Battery G, 1st Rhode Island: Cpt Charles D. Owen

IV Corps

Division	Brigade	Regiments and Others
First Division from the IV Corps serving with VI Corps 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: 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, Third Battery: Capt William Stuart 1st Pennsylvania Light Artillery, Battery C: Capt Jeremiha McCarthy 1st Pennsylvania Light Artillery, Battery D: Capt Michael Hall 2nd United States, Battery G: Lt John H. Butler

V Corps

MG Fitz John Porter
Escort:
Detachment, 1st Maine Cavalry: Cpt George J. Summat

Division	Brigade	Regiments and Others
First 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 2nd Company, Massachusetts Sharpshooters: Cpt Lewis E. Wentworth
	2nd Brigade BG Charles Griffin	2nd D.C.: 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 Brady's Company, Michigan Sharpshooters: Lt Jonas H. Titus Jr.
	Artillery	3rd Massachusetts Battery: Cpt Augustus P. Martin Battery C, 1st Rhode Island: Cpt Richard Waterman Battery D, 5th U.S.: Lt Charles E. Hazlett
Second Division BG George Sykes	1st Brigade Ltc Robert C. Buchanan	3rd U.S.: Cpt John D. Wilkins 4th U.S.: Cpt Hiram Dryer 12th U.S. (1st Battalion): Cpt Matthew M. Blunt 12th U.S. (2nd Battalion): Cpt Thomas M. Anderson 14th U.S. (1st Battalion): Cpt W. Harvey Brown 14th U.S. (2nd Battalion): Cpt David B. McKibbin
	2nd Brigade Maj Charles S. Lovell	1st and 6th U.S.: Cpt Levi C. Bootes 2nd and 10th U.S.: Cpt John S. Poland 11th U.S.: Cpt DeLancey Floyd-Jones 17th U.S.: Maj George L. Andrews
	3rd Brigade Col Gouverneur K. Warren	5th New York: Cpt Cleveland Winslow 10th New York: Ltc John W. Marshall
	Artillery	Batteries E and G, 1st U.S.: Lt Alanson M. Randol Battery I, 5th U.S.: Cpt Stephen H. Weed Battery K, 5th U.S.: Lt William E. Van Reed
Third Division (reached the battlefield 18 September) BG Andrew A. Humphreys	1st Brigade BG Erastus B. Tyler	91st Pennsylvania: Col Edgar M. Gregory 126th Pennsylvania: Col. James G. Elder 129th Pennsylvania: Col Jacob G. Frick 134th Pennsylvania: Col Matthew S. Quay
	2nd Brigade Col Peter H. Allabach	123rd Pennsylvania: Col John B. Clark 131st Pennsylvania: Ltc William B. Shaut 133rd Pennsylvania: Col Franklin B. Speakman 155th Pennsylvania: Col Edward J. Allen
	Artillery	Battery C, 1st New York: Cpt Almont Barnes Battery L, 1st Ohio: Cpt Lucius N. Robinson
Artillery Reserve Ltc William Hays		Battery A, 1st Battalion New York: Lt Bernhard Wever Battery B, 1st Battalion New York: Lt Alfred von Kleiser Battery C, 1st Battalion New York: Cpt Robert Langner Battery D, 1st Battalion New York: Cpt Charles Kusserow 5th New York: Cpt Elijah D. Taft Battery K, 1st U.S.: Cpt William M. Graham Battery G, 4th U.S.: Lt Marcus P. Miller

VI Corps

MG William B. Franklin
Escort:
B and G, 6th Pennsylvania Cavalry: Cpt Henry P. Muirheid

Division	Brigade	Regiments and Others
First Division MG Henry W. Slocum	1st Brigade (1st New Jersey Brigade) Col Alfred T. A. Torbert	1st New Jersey: Ltc Mark W. Collet 2nd New Jersey: Col Samuel L. Buck 3rd New Jersey: Col Henry W. Brown 4th New Jersey: Col William B. Hatch
	2nd Brigade Col Joseph J. Bartlett	5th Maine: Col Nathaniel J. Jackson 16th New York: Ltc Joel J. Beaver 27th New York: Ltc Alexander D. Adams 96th Pennsylvania: Col Henry L. Cake
	3rd Brigade BG John Newton	18th New York: Ltc George R. Myers 31st New York: Ltc Francis H. Pinto 32nd New York: Col Roderick N. Matheson (mw, 9/14), Maj George F. Lemon (mw, 9/14) 95th Pennsylvania: Col Gustavus W. Town
	Artillery Cpt Emory Upton	Battery A, Maryland Light Artillery: Cpt John W. Wolcott Battery A, 1st Massachusetts: Cpt Josiah Porter Battery A, 1st New Jersey: Cpt William Hexamer Battery D, 2nd U.S.: Lt Edward B. Williston
Second Division MG William F. Smith	1st Brigade BG Winfield S. Hancock Col Amasa Cobb	6th Maine: Col Hiram Burnham 43rd New York: Maj John Wilson 49th Pennsylvania: Ltc William Brisbane 137th Pennsylvania: Col Henry M. Bossert 5th Wisconsin: Col Amasa Cobb
	2nd Brigade (1st Vermont Brigade) BG William T. H. Brooks	2nd Vermont: Maj James H. Walbridge 3rd Vermont: Col Breed N. Hyde 4th Vermont: Ltc Charles B. Stoughton 5th Vermont: Col Lewis A. Grant 6th Vermont: Maj Oscar L. Tuttle
	3rd Brigade Col William H. Irwin	7th Maine: Maj Thomas W. Hyde 20th New York: Col Ernest von Vegesack 33rd New York: Ltc Joseph W. Corning 49th New York: Ltc William C. Alberger (w), Maj George W. Johnson 77th New York: Cpt Nathan S. Babcock
	Artillery Cpt Romeyn B. Ayres	Battery B, Maryland Light Artillery: Lt Theodore J. Vanneman 1st New York Battery: Cpt Andrew Cowan Battery F, 5th U.S.: Lt Leonard Martin

IX Corps

MG Ambrose Burnside
BG Jacob D. Cox
Escort:
Company G, 1st Maine Cavalry: Cpt Zebulon B. Blethen

Division	Brigade	Regiments and Others
First Division BG Orlando B. Willcox	1st Brigade Col Benjamin C. Christ	28th Massachusetts: Cpt Andrew P. Caraher 17th Michigan: Col William H. Withington 79th New York: Ltc David Morrison 50th Pennsylvania: Maj Edward Overton (w), Cpt William H. Diehl
	2nd Brigade Col Thomas Welsh	8th Michigan (transferred to First Brigade, 16 September): Ltc Frank Graves, Maj Ralph Ely 46th New York: Ltc Joseph Gerhardt 45th Pennsylvania: Ltc John I. Curtin 100th Pennsylvania: Ltc David A. Leckey
	Artillery	8th Massachusetts Battery: Cpt Asa M. Cook Battery E, 2nd U.S.: Lt Samuel N. Benjamin
Second Division BG Samuel D. Sturgis	1st Brigade BG James Nagle	2nd Maryland: Ltc J. Eugene Duryea 6th New Hampshire: Col Simon Goodell Griffin 9th New Hampshire: Col Enoch Q. Fellows 48th Pennsylvania: Ltc Joshua K. Sigfried
	2nd Brigade BG Edward Ferrero	21st Massachusetts: Col William S. Clark 35th Massachusetts: Col Edward A. Wild (w at South Mountain), Ltc Sumner Carruth (w) 51st New York: Col Robert B. Potter 51st Pennsylvania: Col John F. Hartranft
	Artillery	Battery D, Pennsylvania Light Artillery: Cpt George W. Durell Battery E, 4th U.S.: Cpt Joseph C. Clark, Jr. (w)
Third Division BG Isaac P. Rodman (mw) Col Edward Harland	1st Brigade Col Harrison S. Fairchild	9th New York: Ltc Edgar A. Kimball 89th New York: Maj Edward Jardine 103rd New York: Maj Benjamin Ringold
	2nd Brigade Col Edward Harland	8th Connecticut: Ltc Hiram Appelman (w), Maj John H. Ward 11th Connecticut: Col Henry W. Kingsbury (k) 16th Connecticut: Col Francis Beach 4th Rhode Island: Col William H. P. Steere (w), Ltc Joseph B. Curtis
	Artillery	Battery A, 5th U.S.: Lt Charles P. Muhlenberg
Kanawha Division BG Jacob D. Cox Col Eliakim P. Scammon	1st Brigade Col Eliakim P. Scammon Col Hugh Boyle Ewing	12th Ohio: Col Carr B. White 23rd Ohio: Maj James M. Comly 30th Ohio: Col Hugh Boyle Ewing, Ltc Theodore Jones (w/c), Maj George H. Hildt 1st Ohio Independent Light Artillery: Cpt James Ross McMullin Gilmore's Company, West Virginia Cavalry: Lt James Abraham Harrison's Company, West Virginia Cavalry: Lt Dennis Delaney
	2nd Brigade Col Augustus Moor (c) Col George Crook	11th Ohio: Ltc Augustus H. Coleman (k), Maj Lyman J. Jackson 28th Ohio: Ltc Gottfried Becker 36th Ohio: Col George Crook, Ltc Melvin Clarke (k), Maj E. B. Andrews Chicago (Illinois) Dragoons: Cpt Frederick Schambeck Kentucky Battery: Cpt Seth J. Simmonds
	Unattached troops	6th New York Cavalry (8 companies): Col Thomas C. Devin 3rd Company, Ohio Cavalry: Lt Jonas Seamen Batteries L and M, 3rd U.S.: Cpt John Edwards, Jr.

XII Corps

MG Joseph K. Mansfield (mw)
BG Alpheus S. Williams
Escort:
Company L, 1st Michigan Cavalry: Cpt Melvin Brewer

Division	Brigade	Regiments and Others
First Division BG Alpheus S. Williams BG Samuel W. Crawford (w) BG George H. Gordon	1st Brigade BG Samuel W. Crawford Col Joseph F. Knipe	10th Maine: Col George L. Beal (w) 28th New York: Cpt William H. H. Mapes 46th Pennsylvania: Col Joseph F. Knipe, Ltc James L. Selfridge 124th Pennsylvania: Col Joseph W. Hawley (w), Maj Isaac L. Haldeman 125th Pennsylvania: Col Jacob Higgins 128th Pennsylvania: Col Samuel Croasdale (k), Ltc William W. Hammersly (w), Maj Joel B. Wanner
	3rd Brigade BG George H. Gordon Col Thomas H. Ruger (w)	27th Indiana: Col Silas Colgrove 2nd Massachusetts: Col George L. Andrews 13th New Jersey: Col Ezra A. Carman 107th New York: Col Robert B. Van Valkenburg Pennsylvania Zouaves d'Afrique 3rd Wisconsin: Col Thomas H. Ruger (w)
Second Division BG George S. Greene	1st Brigade Ltc Hector Tyndale (w) Maj Orrin J. Crane	5th Ohio: Maj John Collins 7th Ohio: Maj Orrin J. Crane, Cpt Frederick A. Seymour 66th Ohio: Ltc Eugene Powell (w) 28th Pennsylvania: Maj Ario Pardee, Jr.
	2nd Brigade Col Henry J. Stainrook	3rd Maryland: Ltc Joseph H. Sudsburg 102nd New York: Ltc James C. Lane 111th Pennsylvania: Maj. Thomas M. Walker
	3rd Brigade Col William B. Goodrich (k) Ltc Jonathan Austin	3rd Delaware: Maj Arthur Maginnis (w), Cpt William J. McKaig Purnell (Maryland) Legion: Ltc Benjamin L. Simpson 60th New York: Ltc Charles R. Brundage 78th New York: Ltc Jonathan Austin, Cpt Henry R. Stagg
	Artillery Cpt Clermont L. Best	4th Maine Battery: Cpt O'Neill W. Robinson, Jr. 6th Maine Battery: Cpt Freeman McGilvery Battery M, 1st New York: Cpt George W. Cothran 10th New York Battery: Cpt John T. Bruen Battery E, Pennsylvania Light Artillery: Cpt Joseph M. Knap Battery F, Pennsylvania Light Artillery: Cpt Robert B. Hampton Battery F, 4th U.S.: Lt Edward D. Muhlenberg

Cavalry

Division	Brigade	Regiments and Others
Cavalry Division BG Alfred Pleasonton	1st Brigade Maj Charles J. Whiting	5th U.S.: Cpt Joseph H. McArthur 6th U.S.: Cpt William P. Sanders
	2nd Brigade Col John F. Farnsworth	8th Illinois: Maj. William H. Medill 3rd Indiana: Maj George H. Chapman 1st Massachusetts: Cpt Casper Crowninshield 8th Pennsylvania: Cpt Peter Keenan
	3rd Brigade Col Richard H. Rush	4th Pennsylvania: Col James H. Childs (k), Ltc James K. Kerr 6th Pennsylvania: Ltc C. Ross Smith
	4th Brigade Col Andrew T. McReynolds	1st New York: Maj Alonzo W. Adams 12th Pennsylvania: Maj James A. Congdon
	5th Brigade Col Benjamin F. Davis	8th New York: Col Benjamin F. Davis 3rd Pennsylvania: Ltc Samuel W. Owen
	Horse Artillery	Battery A, 2nd U.S.: Cpt John C. Tidball Batteries B & L, 2nd U.S.: Cpt James M. Robertson Battery M, 2nd U.S.: Lt Peter C. Hains Batteries C & G, 2nd U.S.: Cpt Horatio G. Gibson
	Unattached	15th Pennsylvania Cavalry (detachment): Col William J. Palmer

References

Antietam National Battlefield
U.S. War Department, The War of the Rebellion: a Compilation of the Official Records of the Union and Confederate Armies], U.S. Government Printing Office, 1880–1901.