United States Army > Army of the Potomac
October 1861 • to November >
Commanded by Brigadier General Samuel P. Heintzelman
Created October 3, 1861
| First Brigade | Bde. Gen. Israel B. Richardson | |
| 2nd Michigan Infantry Regiment | Colonel Orlando M. Poe | from Richrdson’s Brig, Div. Potomac |
| 3rd Michigan Infantry Regiment | Colonel Daniel McConnell (res. 10/22) Colonel Stephen Champlin |
from Richrdson’s Brig, Div. Potomac |
| 5th Michigan Infantry Regiment | Colonel Henry D. Terry | from Michigan 9/13 |
| 37th New York Infantry Regiment | Colonel Samuel B. Hayman | from Hunter’s Brig, Div. Potomac |
| Second Brigade | Bde. Gen. John Sedgwck | |
| 3rd Maine Infantry Regiment | Colonel Henry G. Staples | |
| 4th Maine Infantry Regiment | Colonel Hiram G. Berry | |
| 38th New York Infantry Regiment | Colonel John H.H. Ward | |
| 40th New York Infantry Regiment | Colonel Edward J. Riley | |
| Third Brigade | Bde. Gen. C. D. Jameson | |
| 45th Pennsylvania Infantry Regiment | Colonel Thomas Welsh | from Harrisburg 10/23 |
| 61st Pennsylvania Infantry Regiment | Colonel Oliver H. Rippey | from Pittsburg 9/7 |
| 63rd Pennsylvania Infantry Regiment | Colonel Alexander Hays | from Pittsburg 8/26 |
| 99th Pennsylvania Infantry Regiment | Colonel Romaine Lujeane | from Philadelphia 8/8 |
| 105th Pennsylvania Infantry Regiment | Colonel Amor A. McKnight | from Pittsburg |
| Artillery and Cavalry | ||
| 1st Rhode Island Artilery, Battery E | from Providence 10/4 | |
| 1st New Jersey Artillery, Battery B | from Trenton 10/22 | |
| 2nd United States Artillery, Battery G | from Kearney’s Brigade | |
| 1st New Jersey Cavalry Regiment | Colonel William Halstead |