< to August • September 1862

Commanded by Brigadier General James B. Ricketts

The 2nd Division was transferred to the Army of the Potomac as the Second Division, First Army Corps, on September 12, 1862.

First Brigade Brigadier General Abram Duryea
97th New York Infantry Regiment Lt. Colonel John P. Spotford
104th New York Infantry Regiment Major Lewis C. Skinner
105th New York Infantry Regiment Colonel James M. Fuller (dis. 8/2)
Colonel Howard Carroll
107th Pennsylvania Infantry Regiment Colonel Thomas F. McCoy
Second Brigade Colonel William H. Christian
26th New York Infantry Regiment Lt. Colonel Richard H. Richardson
94th New York Infantry Regiment Colonel Adrian R. Root
88th Pennsylvania Infantry Regiment Major Goerge W. Gile
90th Pennsylvania Infantry Regiment Colonel Peter Lyle
Third Brigade Colonel John W. Stiles (to 9/2)
Brigadier General G. L. Hartsuff
12th Massachusetts Infantry Regiment Major Elisha Burbank
13th Massachusetts Infantry Regiment Colonel Samuel H. Leonard
9th New York State Militia Lt. Colonel William Atterbury (to 9/2)
Colonel John W. Stiles (after 9/2)
11th Pennsylvania Infantry Regiment Colonel Richard Coulter
 Fourth Brigade Colonel Joseph Thoburn
84th Pennsylvania Infantry Regiment Colonel Samuel M. Bowman to Potomac, 3 Corps, 2 Div., 2 Brig.
110th Pennsylvania Infantry Regiment Colonel William D. Lewis to Potomac, 3 Corps, 1 Div., 3 Brig.
1st West Virginia Infantry Regiment Colonel Joseph Thoburn to Washington, Whipple, 2 Brig.
2nd Maine Battery Captain James A. Hall
5th Maine Battery Captain G. F. Leppien
Battery F, 1st Pennsylvania Lt. Artillery Captain Ezra P. Matthews
Pennsylvania Independent Battery C Captain James Thompson