United States Army > Army of the Potomac

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Commanded by Major General Edwin V. Sumner

Two more brigades were added to Kimball’s Brigade to create a 3rd Division before the corps left Washington for the Maryland Campaign. It suffered heavy casualties at the Battle of Antietam, especially the 1st Division in the West Woods and the 2nd Division at the Sunken Road.

First Division Brigadier General Israel B. Richardson (mw 9/17)
Brigadier General J. Caldwell (9/17)
Brigadier General W. S. Hancock (after 9/17)
1st Brigade Brigadier General John C. Caldwell
2nd Brigade Brig. Gen. Thomas Meagher (ex. 9/17 – 9/18)
Colonel J. Burke (9/17 – 9/18)
3rd Brigade Brigadier General W. H. French (to 9/6)
Colonel J. R. Brooke
Second Division Brigadier General John Sedgwick (w 9/17)
Brigadier General O. O. Howard
1st Brigade Brigadier General W. A. Gorman
2nd Brigade Brig. Gen. Oliver O. Howard (^ 9/17)
Colonel J. T. Owen (9/17)
Colonel DeWitt C. Baxter (after 9/17)
3rd Brigade Colonel W. L. Tidball (to 9/7)
Brig. Gen. Napoleon Dana (9/7 – 9/17)
Colonel Norman Hall (after 9/17)
Third Division Brigadier General W. H. French (after 9/6)
1st Brigade Brig. Gen. Nathan Kimball
2nd Brigade Colonel Dwight Morris
3rd Brigade Brigadier General Max Weber (to 9/17)
Colonel J. W. Andrews
 from Dept. Virginia
1st New York Artillery, Battery G Captain J.D. Frank  to 2nd Division 9/10
Rhode Island Artillery, Battery G Captain C. D. Owen  to 2nd Division 9/10