< to September • October 1861 • to November >
Commanded by Major General John Dix
| Infantry | ||
| 2nd Delaware Infantry Regiment | Colonel W. Henry Wharton | from Wilmington 10/7 |
| 21st Indiana Infantry Regiment | Colonel James W. McMillan | |
| 1st Maryland Eastern Shore Regiment | Colonel James Wallace | |
| 2nd Maryland Eastern Shore Regiment | Colonel Edward Wilkins | Organized at Charlestown, Md. |
| 2nd Maryland Infantry Regiment | Colonel John Sommer | |
| 3rd Maryland Infantry Regiment | Colonel John C. McConnell | |
| 5th Maryland Infantry Regiment | Colonel William L. Schley | |
| Patapsco Maryland Guard | Colonel James W. McMillan | |
| 17th Massachusetts Infantry Regiment | Colonel Thomas I.C. Amory | |
| 7th Maine Infantry Regiment | Col. Thomas Marshall (died 10/25) Lt. Colonel Edward C. Mason |
to Smith’s Div., Davidson’s Bde. |
| 10th Maine Infantry Regiment | Colonel George L. Beale | from Portland 10/6 |
| 6th Michigan Infantry Regiment | Colonel Frederick W. Curtenius | |
| 3rd New York Infantry Regiment | Colonel Samuel M. Alford | |
| 4th New York Infantry Regiment | Colonel Alfred W. Taylor | |
| 5th New York Infantry Regiment | Colonel Abram Duryea (to BG. 9/10) Colonel Gouverneur K. Warren |
|
| 87th Pennsylvania Infantry Regiment | Colonel George Hay | |
| Artillery & Cavalry | ||
| Battery A, Maryland Light Artillery | Organized at Baltimore, Md. | |
| Battery B, Maryland Light Artillery | Organized at Baltimore, Md. | |
| 2nd United States Artillery, Battery I | at Fort McHenry | |
| 1st Maryland Cavalry Regiment | Colonel Andrew G. Miller |