Commanded by Major General Franz Sigel
Sigel’s Division was created on June 4, 1862 from units in the Middle Department and Defenses of Washington. On June 26 it became the 2nd Division of the 2nd Corps of the Army of Virginia.
| First Brigade | Brig. Gen. James Cooper | |
| 3rd Maryland Infantry Regiment | ||
| 102nd New York Infantry Regiment | ||
| 109th Pensylvania Infantry Regiment | Colonel Henry J. Stainrook | |
| 111th Pensylvania Infantry Regiment | Colonel Matthew Schlaudecker | |
| 8th & 12th United States Infantry | ||
| Second Brigade | Brig. Gen. John P. Slough | |
| 3rd Delaware Infantry Regiment | ||
| 1st District of Columbia Infantry Regt. | ||
| 11th New York Sate Militia | to Harpers Ferry | |
| 60th New York Infantry Regiment | ||
| 78th New York Infantry Regiment | ||
| Purnell (Maryland) Legion Infantry | ||
| Artillery | ||
| 1st New York Light Artillery, Battery K | to Army VA, 2 Corps 2 Div. | |
| 1st New York Light Artillery, Battery L | to Army VA, 3 Corps 1 Div. | |