< 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