< to June • July 1863 • to August >
Commanded by Major General Robert C. Schenck
| French’s Command | Major General William H. French | |
| Maryland Brigade | Colonel Rutherford B. Hayes | to Army Potomac 1 Corps, 3 Div., 3 Brig. |
| 1st Maryland Infantry Regiment | Colonel Nathan T. DuShane | |
| 4th Maryland Infantry Regiment | Colonel William J.L. Nicodemus | |
| 7th Maryland Infantry Regiment | Colonel Edwin H. Webster | |
| 8th Maryland Infantry Regiment | Colonel Andrew W. Denison | |
| 17th Indiana Battery | to Army Potomac Artillery Reserve | |
| 1st Massachusetts Heavy Artillery Companies B,C,H&I |
to Dept. WV, Maryland Heights, 2 Brig. | |
| Second Brigade | Colonel Carr B. White | to Army Potomac, 3 Corps 3 Div. 1 Brig. |
| 14th New Jersey Infantry Regiment | Colonel William S. Truex | |
| 6th New York Heavy Artillery | Colonel J. Howard Kitching | |
| 151st New York Infantry Regiment | Colonel William Emerson | |
| 10th Vermont Infantry Regiment | ||
| 126th Ohio Infantry Regiment | Colonel Benjamin F. Smith | |
| Artillery | ||
| 4th Maine Independent Battery | to Army Potomac Artillery | |
| 10th Massachusetts Battery | to Army Potomac Artillery | |
| Baltimore (MD) Battery | to Defenses Baltimore (below) | |
| West Virginia Artillery, Battery F | to 22 Corps Camp Barry | |
| Second Separate Brigade | Brevet Brigadier General William W. Morris | |
| 5th Delaware Infantry Regiment | ||
| 5th New York Heavy Artillery | Colonel Samuel Graham | |
| 7th New York National Guard | mustered out 7/21 | |
| 17th New York National Guard | Lieutenant Colonel John P. Jenkins | from New York |
| 18th New York National Guard | from New York | |
| 55th New York National Guard | from New York; mustered out 7/27 | |
| 69th New York National Guard | Colonel James Bagley | from New York; mustered out 7/25 |
| 8th New York Heavy Artillery |
Colonel Peter A. Porter | |
| 179th Pennsylvania Infantry Regiment | Colonel William H. Blair | mustered out 7/27 |
| 2nd United States Artillery, Battery I | at Fort McHenry | |
| Third Separate Brigade | Colonel S. A. Graham | reorganized 7/12 |
| 3rd Delaware Infantry Regiment | Colonel Samuel H. Jenkins | from Lockwood’s Command |
| 3rd Maryland Potomac Home Brigade | Colonel Stephen W. Downey | from Annapolis |
| Purnell Legion Infantry (MD) | Colonel Samuel A. Graham | from Lockwood’s Command |
| Loudon VA Rangers | from Lockwood’s Command | |
| 5th United States Artillery, Battery L | from 2 Div. 1 Brig. | |
| Elliott’s Command | Brigadier General W. L. Elliott | to 3rd Corps, 3rd Div. |
| 6th Maryland Infantry Regiment | Colonel John W. Horn | |
| 110th Ohio Infantry Regiment | Colonel Joseph W. Keifer | |
| 122nd Ohio Infantry Regiment | Colonel William H. Ball | |
| 126th Ohio Infantry Regiment | Colonel Benjamin F. Smith | |
| 67th Pennsylvania Infantry Regiment | Colonel John F. Staunton | |
| 87th Pennsylvania Infantry Regiment | ||
| 138th Pennsylvania Infantry Regiment | Colonel M. R. McClennan | |
| 106th New York Infantry Regiment | ||
| Defences of Baltimore | Brigadier General E. B. Tyler | |
| 1st Connecticut Cavalry Regiment | from 2 Sep. Brig.; to MD Heights Div., Dept of WV 7/5 | |
| 1st Delaware Cavalry Regiment | ||
| Baltimore (MD) Battery | from French’s Command (above) | |
| Maryland Junior Battery A | ||
| Maryland Junior Battery B | ||
| Purnell Legion Cavalry (Md) Co. B | ||
| 84th New York State Militia | Colonel Frederick A. Conkling | from New York |
| 3rd Pennsylvania Heavy Artillery, Co. H | Captain William D. Rank | |
| Annapolis | ||
| 2nd Maryland Cavalry , 5 Cos. | mustered in July | |
| District of Delaware | Brigadier Genral Daniel Tyler | Created 7/3 |
| 3rd Pennsylvania Heavy Artillery, Co. M | new, from PA | |
| Pennsylvania Independent Battery A | At Fort Delaware | |
| Pennsylvania Independent Battery G | At Fort Delaware |