Commanded by:
Major General Israel B. Richardson (mw)(1)
Brigadier General John C. Caldwell
Brigadier General Winfield S. Hancock (2)
| First Brigade | Brigadier General John C. Caldwell (^) | |
| 5th New Hampshire Infantry Regiment | Colonel Edward E. Cross (w) | |
| 7th New York Infantry Regiment | Captain Charles Brestel | |
| 61st New York Infantry Regiments | Colonel Francis C. Barlow (w)(3) Lieutenant Colonel Nelson A. Miles |
|
| 64th New York Infantry Regiments | Colonel Francis C. Barlow (w)(3) Lieutenant Colonel Nelson A. Miles |
|
| 81st Pennsylvania Infantry Regiment | Lieutenant Colonel Henry Boyd McKeen | |
| Second Brigade (Irish Brigade) | Brigadier General Thomas F. Meagher (w) Colonel John Burke (4) |
|
| 29th Massachusetts Infantry Regiment | Lieutenant Colonel Joseph H. Barnes | |
| 63rd New York Infantry Regiment | Colonel John Burke (^) Lieutenant Colonel Henry Fowler (w) Major Richard C. Bentley (w) Captain Joseph O’Neill |
|
| 69th New York Infantry Regiment | Lieutenant Colonel James Kelly (w) Major James Cavanagh |
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| 88th New York Infantry Regiment | Lieutenant Colonel Patrick Kelly | |
| Third Brigade | Colonel John R. Brooke | |
| 2nd Delaware Infantry Regiment | Captain David L. Stricker | |
| 52nd New York Infantry Regiment | Colonel Paul Frank | |
| 57th New York Infantry Regiment | Lieutenant Colonel Philip S. Parisen (k) Major Alford B. Chapman |
|
| 66th New York Infantry Regiment | Captain Julius Wehle Lieutenant Colonel James H. Bull |
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| 53rd Pennsylvania Infantry Regiment | Lieutenant Colonel Richards McMichael | |
| Artillery | ||
| 1st New York Light Artillery, Battery B | Captain Rufus D. Pettit | |
| 4th United States Artillery, Batteries A & C | Lieutenant Evan Thomas |
Key to notes:
(k) = killed, (w) = wounded, (mw) = mortally wounded, (c) = captured. (^) = took command of parent unit
Links for regiments, batteries, companies, and individuals go to unit histories or biographies on www.civilwarintheeast.com
Notes:
(1) There is a monument to General Richardson in the Sunken Road on the Antietam battlefield
(2) Brigadier General Hancock was transferred from command of the 2nd Division, 6th Corps
(3) Colonel Barlow’s 61st New York was temporarily consolidated with the 64th New York during the battle.
(4) Colonel Burke was charged with abandoning his regiment during the fight for the Sunken Road. After a court matial he was dismissed from the service.