< to May • June 1862

Commanded by Brigadier General Silas Casey

The 3rd Division of the 4th Corps was redesignated as the 2nd Division, taking the place of the Smith’s Division that was transferred to the 6th Corps. The 3rd Brigade of the 3rd Division was broken up between the 1st and 2nd Brigades.

First Brigade Brig. Gen. Henry M. Naglee 
11th Maine Infantry Regiment Colonel John C. Caldwell
56th New York Infantry Regiment Colonel Charles H. Van Wyck
100th New York Infantry Regiment Colonel James M. Brown
52nd Pennsylvania Infantry Regiment Colonel John C. Dodge
104th Pennsylvania Infantry Regiment Captain Edward Rogers (to 6/4)
Lt. Colonel John W. Neilds 
Second Brigade Brig. Gen. William H. Keim
96th New York Infantry Regiment Colonel James Fairman
85th Pennsylvania Infantry Regiment Colonel Joshua B. Howell
101st Pennsylvania Infantry Regiment Lt. Colonel David B. Morris (w)
Captain Charles W. May
103rd Pennsylvania Infantry Regiment Major Audley W. Gazzon
Third Brigade Brig. Gen. Innis N. Palmer
81st New York Infantry Regiment Lt. Colonel Jacob J. DeForest (w)
Captain W. C. Raulston
 to 1st Brig. (above)
85th New York Infantry Regiment Colonel Jonathan S. Belknap  to 2nd Brig. (above)
92nd New York Infantry Regiment Lt. Colonel Hiram Anderson, Jr.  to 2nd Brig. (above)
98th New York Infantry Regiment Colonel William Dutton  to 1st Brig. (above)
Artillery Captain Peter C. Regan
Battery H, 1st New York Artillery Lieutenant Charles E. Mink
7th New York Independent Battery Captain Peter C. Regan
8th New York Independent Battery Captain Butler Fitch