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] MG George McClellan General Staff General Headquarters[5] Escort: 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: MG Joseph Hooker (w)
BG George G. Meade[8] Escort: First Division
Col Walter Phelps, Jr.
Cpt J. Albert Monroe Second Division
Col Richard Coulter Third Division
Col Richard Biddle Roberts
Ltc Robert Anderson MG Edwin V. Sumner Escort: First Division
Col John R. Brooke Second Division
Col Gouverneur K. Warren Third Division[19]
Cpt Romeyn B. Ayres MG Ambrose Burnside[20]
BG Jacob D. Cox Escort: First Division
Col Thomas Welsh Second Division
Col Edward Harland Kanawha Division
Col George Crook MG Joseph K. Mansfield (mw)
BG Alpheus S. Williams Escort: First Division
Col Thomas H. Ruger (w) Second Division
Col William B. Goodrich (mw)