< to September • October 1863 • to November >
Commanded by Major General Robert C. Schenck
| First Separate Brigade | Brigadier General Henry H. Lockwood | recreated Oct. |
| 3rd Delaware Infantry Regiment | Colonel Samuel H. Jenkins | from 3 Sep. Brig. |
| 3rd Maryland Potomac Home Brigade | Colonel Stephen W. Downey | from 3 Sep. Brig. |
| Purnell Legion Infantry (MD) | Colonel Samuel A. Graham | from 3 Sep. Brig. |
| 1st Maryland Eastern Shore Regiment | Colonel James Wallace | from Dept. WV, MD Heights Div., 2 Brig. |
| Second Separate Brigade | Brevet Brigadier General William W. Morris | |
| 5th New York Heavy Artillery | at Baltimore | |
| 8th New York Heavy Artillery | Colonel Peter A. Porter | |
| 2nd United States Artillery, Battery I | at Fort McHenry | |
| Defences of Baltimore/ Third Separate Brigade |
Brigadier General Erastus B. Tyler | redesignated 10/1 |
| 1st Delaware Cavalry Regiment | ||
| 3rd Maryland Cavalry Regiment | Colonel Charles Carroll Tevis | |
| Baltimore (MD) Battery | ||
| Maryland Junior Battery A | ||
| Maryland Junior Battery B | ||
| Purnell Legion Cavalry (Md) Co. B | ||
| 3rd Pennsylvania Heavy Artillery, Co. H | Captain William D. Rank | |
| Annapolis | ||
| 2nd Maryland Cavalry , 5 Cos. | ||
| District of Delaware | Brigadier Genral Daniel Tyler | |
| Ahl’s Delaware Heavy Artillery Co. | ||
| Purnell Legion Cavalry (Md) Co. C | ||
| Pennsylvania Independent Battery A | At Fort Delaware | |
| Pennsylvania Independent Battery G | At Fort Delaware |