< to August • September 1862 • to October >
Commanded by Brigadier General George W. Morrell
| First Brigade | Colonel James Barnes |
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| 2nd Maine Infantry Regiment | Colonel Charles W. Roberts |
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| 20th Maine Infantry Regiment | Colonel Adelbert Ames | from Dept. of Washington |
| 18th Massachusetts Infantry Regiment | Lt. Colonel Joseph Hayes | |
| 22nd Massachusetts Infantry Regiment | Lt. Colonel William S. Tilton | |
| 32nd Massachusetts Infantry Regiment | Colonel Francis J. Parker | to 2 Brig. (below) |
| 1st Michigan Infantry Regiment | Captain E. W. Belton | |
| 13th New York Infantry Regiment | Colonel Elisha G. Marshall | |
| 25th New York Infantry Regiment | Colonel Charles A. Johnson | |
| 118th Pennsylvania Infantry Regiment | Colonel Charles M. Prevost (w 9/19) Lt. Colonel James Gwyn |
from Dept. Washington |
| Second Brigade | Brig. Gen. Charles Griffin | |
| 9th Massachusetts Infantry Regiment | Colonel Patrick R. Guiney | |
| 32nd Massachusetts Infantry Regiment | Colonel Francis J. Parker | from 1 Brig. (above) |
| 4th Michigan Infantry Regiment | Colonel Jonathan W. Childs | |
| 14th New York Infantry Regiment | Colonel James McQuade | |
| 62nd Pennsylvania Infantry Regiment | Colonel Jacob B. Sweitzer | |
| Third Brigade | Colonel H. S. Lansing (to 9/18) Colonel Thomas B. W. Stockton |
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| 16th Michigan Infantry Regiment | Lt. Colonel Norval E. Welch | |
| 12th New York Infantry Regiment | Captain William Huson | |
| 17th New York Infantry Regiment | Lt. Colonel Nelson B. Bartram | |
| 44th New York Infantry Regiment | Colonel James O. Rice |
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| 83rd Pennsylvania Infantry Regiment | Captain Orpheus S. N. Woodward | |
| Sharpshooters | ||
| 1st United States Sharpshooters | Captain John B. Isler | |
| Artillery | ||
| 3rd Massachusetts Battery | Captain Augustus P. Martin | |
| 5th Massachusetts Battery | ||
| 1st Rhode Island Artillery, Battery C | Captain Richard Waterman | |
| 5th United States Artillery, Battery D | Lieutenant Charles E. Hazlett | |