United States Army > Army of the Potomac
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“The Pennsylvania Reserves”
Commanded by Brigadier General George A. McCall
| First Brigade | Brig. Gen. John Reynolds | |
| 1st Pennsylvania Reserves | Colonel Richard B. Roberts | |
| 2nd Pennsylvania Reserves | Colonel William B. Mann | from Sandy Hook 9/25 |
| 5th Pennsylvania Reserves | Colonel Seneca G. Simmons | |
| 8th Pennsylvania Reserves | Colonel George S. Hays | |
| Second Brigade | Brig. Gen. George Meade | |
| 3rd Pennsylvania Reserves | Colonel Horatio G. Sickel | |
| 4th Pennsylvania Reserves | Col. Robert G. March | |
| 7th Pennsylvania Reserves | Colonel Elisha B. Harvey | |
| 11th Pennsylvania Reserves | Colonel Thomas F. Gallagher | |
| Third Brigade | Brig. Gen. Edward O. C. Ord (from 9/14) | |
| 6th Pennsylvania Reserves | Colonel William W. Ricketts | |
| 9th Pennsylvania Reserves | Colonel Conrad F. Jackson | |
| 10th Pennsylvania Reserves | Colonel John S. McCalmont | |
| 12th Pennsylvania Reserves | Colonel John H. Taggart | |
| Artillery and Cavalry | ||
| Battery A, 1st Pennsylvania Artillery | ||
| Battery B, 1st Pennsylvania Artillery | ||
| Battery G, 1st Pennsylvania Artillery | ||
| Battery C, 5th United States Artillery | newly organized in Washington | |
| 1st Pennsylvania Cavalry | Col. George Bayard (from 9/14) | |