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. Order of battle compiled from the army organization[1] during the Maryland Campaign,[2] the casualty returns[3] and the reports.[4]

Abbreviations used

Military rank

Other

Army of the Potomac

MG George McClellan

General Staff and Headquarters

General Staff

General Headquarters[5]

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:[6] Maj William H. Wood

Headquarters Guard:[7] Maj Granville O. Haller

Quartermaster's Guard:

I Corps

MG Joseph Hooker (w)
BG George G. Meade[8]

Escort:

Division Brigade Regiments and Others

First Division
     BG Abner Doubleday

1st Brigade


   Col Walter Phelps, Jr.

2nd Brigade


   Ltc J. William Hofmann

3rd Brigade


   BG Marsena R. Patrick

4th Brigade


   BG John Gibbon

Artillery


   Cpt J. Albert Monroe

Second Division
     BG James B. Ricketts[9] (w)

1st Brigade


   BG Abram Duryée

2nd Brigade[10]


   Col William A. Christian
   Col Peter Lyle

3rd Brigade[11]


   BG George L. Hartsuff (w)
   Col Richard Coulter

Artillery

Third Division
     BG George G. Meade[8]
     BG Truman Seymour

1st Brigade


   BG Truman Seymour
   Col Richard Biddle Roberts

2nd Brigade


   Col Albert L. Magilton

3rd Brigade


   Ltc Robert Anderson

Artillery[12]

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[13]

1st Brigade


   BG John C. Caldwell

2nd Brigade


   BG Thomas F. Meagher (w)
   Col John Burke

3rd Brigade


   Col John R. Brooke

Artillery

Second Division
     MG John Sedgwick (w)
     BG Oliver O. Howard

1st Brigade


   BG Willis A. Gorman

2nd Brigade


   BG Oliver O. Howard
   Col Joshua T. Owen
   Col DeWitt C. Baxter[14]

3rd Brigade


   BG Napoleon J. T. Dana (w)
   Col Norman J. Hall

Artillery

Third Division
     BG William H. French

1st Brigade


   BG Nathan Kimball

2nd Brigade


   Col Dwight Morris

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

IV Corps

Division Brigade Regiments and Others

First Division[15]
     MG Darius N. Couch

1st Brigade


   BG Charles Devens

2nd Brigade


   BG Albion P. Howe

3rd Brigade


   BG John Cochrane

Artillery

V Corps

MG Fitz John Porter[18]

Escort:

  • 1st Maine Cavalry (detachment): Cpt George J. Summat
Division Brigade Regiments and Others

First Division
     MG George W. Morell

1st Brigade


   Col James Barnes

2nd Brigade


   BG Charles Griffin

3rd Brigade


   Col Thomas B. W. Stockton

Artillery
Sharpshooters

Second Division
     BG George Sykes

1st Brigade


   Ltc Robert C. Buchanan

2nd Brigade


   Maj Charles S. Lovell

3rd Brigade


   Col Gouverneur K. Warren

Artillery

Third Division[19]
     BG Andrew A. Humphreys

1st Brigade


   BG Erastus B. Tyler

2nd Brigade


   Col Peter H. Allabach

Artillery
Artillery Reserve


   Ltc William Hays

VI Corps

MG William B. Franklin

Escort:

  • 6th Pennsylvania Cavalry, Companies B and G: Cpt Henry P. Muirheid
Division Brigade Regiments and Others

First Division
     MG Henry W. Slocum

1st Brigade


   Col Alfred T. A. Torbert

2nd Brigade


   Col Joseph J. Bartlett

3rd Brigade


   BG John Newton

Artillery


   Cpt Emory Upton

Second Division
     MG William F. Smith

1st Brigade


   BG Winfield S. Hancock[13]
   Col Amasa Cobb

2nd Brigade


   BG William T. H. Brooks

3rd Brigade


   Col William H. Irwin

Artillery[17]


   Cpt Romeyn B. Ayres

  • Maryland Light, Battery B: Lt Theodore J. Vanneman
  • New York Light, 1st Battery: Cpt Andrew Cowan
  • 5th United States, Battery F: Lt Leonard Martin

IX Corps

MG Ambrose Burnside[20]
BG Jacob D. Cox

Escort:

Division Brigade Regiments and Others

First Division
     BG Orlando B. Willcox

1st Brigade


   Col Benjamin C. Christ

2nd Brigade


   Col Thomas Welsh

Artillery

Second Division
     BG Samuel D. Sturgis

1st Brigade


   BG James Nagle

2nd Brigade


   BG Edward Ferrero

Artillery

Third Division
     BG Isaac P. Rodman (mw)
     Col Edward Harland[22]
     MG John G. Parke[23]

1st Brigade


   Col Harrison S. Fairchild

2nd Brigade


   Col Edward Harland

Artillery

Kanawha Division
     Col Eliakim P. Scammon

1st Brigade


   Col Hugh B. Ewing

2nd Brigade


   Col George Crook

Unattached troops
  • 6th New York Cavalry (8 companies): Col Thomas C. Devin
  • Ohio Cavalry, 3rd Independent Company: Lt Jonas Seamen
  • 3rd United States, Batteries L and M: Cpt John Edwards, Jr.
  • 2nd New York, Battery L: Cpt Jacob Roemer[24]

XII Corps

MG Joseph K. Mansfield (mw)
BG Alpheus S. Williams

Escort:

  • 1st Michigan Cavalry, Company L: 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[25]


   BG Samuel W. Crawford
   Col Joseph F. Knipe

3rd Brigade


   BG George H. Gordon
   Col Thomas H. Ruger (w)

Second Division
     BG George S. Greene

1st Brigade[27]


   Ltc Hector Tyndale (w)
   Maj Orrin J. Crane

2nd Brigade[28]


   Col Henry J. Stainrook

3rd Brigade


   Col William B. Goodrich (mw)
   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

Cavalry

Division Brigade Regiments and Others

Cavalry Division
     BG Alfred Pleasonton

1st Brigade


   Maj Charles J. Whiting

2nd Brigade


   Col John F. Farnsworth

3rd Brigade


   Col Richard H. Rush

4th Brigade


   Col Andrew T. McReynolds

5th Brigade


   Col Benjamin F. Davis

Horse Artillery
Unattached[29]

Notes

  1. Multiple commander names indicate command succession of command during the battle or the campaign.
  2. Official Records, Series I, Volume XIX, Part 1, pages 169-180; Antietam National Battlefield-Army of the Potomac
  3. Official Records, Series I, Volume XIX, Part 1, pages 189-204
  4. 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
  5. The Volunteer Engineer Brigade (15th and 50th New York) under Brigadier General Daniel P. Woodbury detached at Washington, D. C.
  6. The composition of this command is not fully reported on the returns
  7. Sturges (Illinois) Rifles detached at Washington, D. C.
  8. Assigned to command of the I Corps, September 17, 1862 (see: Official Records, Series I, Volume XIX, Part 2, page 315)
  9. For Ricketts being wounded see: John H. Eicher and David J. Eicher, Civil War High Commands, page 453
  10. Colonel Christian left his command without explanation, after which Colonel Peter Lyle took over command (see
  11. 16th Maine detached as railroad guard
  12. Battery G, 1st Pennsylvania Light Artillery detached at Washington, D. C.
  13. Assigned to command of First Division, II Corps, September 17, 1862 (see: Official Records, Series I, Volume XIX, Part 2, page 316)
  14. Assumed command after the brigade was reunited (see: Howard's report)
  15. Served with the VI Corps; not engaged on September 17, 1862; assigned to the VI Corps as the Third Division September 26, 1862
  16. Joined September 17, 1862
  17. The 3rd Battery New York Light Artillery transferred to First Division, IV Corps September 15, 1862
  18. In reserve; only a portion of the corps engaged
  19. This division was organized September 12, 1862, and reached the battlefield September 18, 1862
  20. On September 16th and 17th, 1862, Major General Burnside exercised general command on the left, and Brigadier General Cox was in immediate command of the corps. Major General Parke served as Burnside's Chief of Staff until September 17, 1862 (see: Burnside's report; John H. Eicher and David J. Eicher, Civil War High Commands, page 416). Lieutenant Colonel George W. Getty served as Chief of Artillery on Burnside's Staff (see: Burnside's report).
  21. Transferred from First Brigade September 16, 1862
  22. Antietam on the Web: Rodman's Division, Ninth Army Corps
  23. John H. Eicher and David J. Eicher, Civil War High Commands, page 416; A Civil War Biography: John G. Parke
  24. Johnson & Anderson 1995, p. 81. Roemer's battery fired 87 rounds.
  25. 5th Connecticut detached at Frederick, Maryland, since September 15, 1862
  26. No officers present; enlisted men of company attached to Second Massachusetts
  27. 29th Ohio detached September 9, 1862
  28. 109th Pennsylvania detached September 13, 1862
  29. 1st Maine detached at Frederick, Maryland

References

  • Antietam National Battlefield
  • Eicher, John H., and David J. Eicher. Civil War High Commands. Stanford, California: Stanford University Press, 2001. ISBN 0-8047-3641-3.
  • Johnson, Curt; Anderson, Richard C. Jr. (1995). Artillery Hell: The Employment of Artillery at Antietam. College Station, Tex.: Texas A&M University Press. ISBN 0-89096-623-0.CS1 maint: ref=harv (link)
  • 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, 18801901.
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