< to July • August 1863 • to September >
Commanded by Major General Robert C. Schenck
| Second Separate Brigade | Brevet Brigadier General William W. Morris | |
| 5th Delaware Infantry Regiment | Colonel Stephen W. Downey | mustered out 8/12 |
| 17th New York State Militia | mustered out 8/13 | |
| 18th New York State Militia | mustered out 8/15 | |
| 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 | |
| Third Separate Brigade | Colonel S. A. Graham | discontinued 8/10 |
| 3rd Delaware Infantry Regiment | Colonel Samuel H. Jenkins | to 2 Sep. Brig. (above) |
| 3rd Maryland Potomac Home Brigade | Colonel Stephen W. Downey | at Monocacy Junction |
| Purnell Legion Infantry (MD) | Colonel Samuel A. Graham | at Fort Delaware |
| Loudon VA Rangers | to Dept. WV, MD Heights, 2 Brig. | |
| 5th United States Artillery, Battery L | to Washington, Camp Barry | |
| Defences of Baltimore | Brigadier General E. B. Tyler | |
| 1st Delaware Cavalry Regiment | ||
| 3rd Maryland Cavalry Regiment | Colonel Charles Carroll Tevis | New Organization |
| Baltimore (MD) Battery | ||
| Maryland Junior Battery A | ||
| Maryland Junior Battery B | ||
| Purnell Legion Cavalry (Md) Co. B | ||
| 84th New York State Militia | Colonel Frederick A. Conkling | mustered out 10/29 |
| 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. | new | |
| Purnell Legion Cavalry (Md) Co. C | from Separate Brig. | |
| 3rd Pennsylvania Heavy Artillery, Co. M | to Dept, VA & NC | |
| Pennsylvania Independent Battery A | At Fort Delaware | |
| Pennsylvania Independent Battery G | At Fort Delaware |