United States Army > Army of the Potomac


March 1862 • to April >

Commanded by Brigadier General Erasmus D. Keyes

The 4th Corps was created on March 3, 1862 and announced March 13, 1862.

First Division

Brigadier General Darius N. Couch
First Brigade Colonel Henry S. Briggs
7th Massachusetts Infantry Regiment Colonel David A. Russell
10th Massachusetts Infantry Regiment
36th New York Infantry Regiment Colonel Charles H. Innes
2nd Rhode Island Infantry Regiment Colonel Frank Wheaton
Second Brigade Brigadier General L. P. Graham
65th New York Infantry Regiment Colonel John Cochrane
67th New York Infantry Regiment Colonel Julius W. Adams
23rd Pennsylvania Infantry Regiment Colonel David B. Birney
61st Pennsylvania Infantry Regiment Colonel Oliver H. Rippey from Heintzelman’s Div., 3 Brig.
82nd Pennsylvania Infantry Regiment Colonel David H. Williams
Third Brigade Brigadier General J. J. Peck
55th New York Infantry Regiment Colonel Philip R. DeTrobriand
62nd New York Infantry Regiment Colonel John L. Riker
93rd Pennsylvania Infantry Regiment Colonel James M. McCarter
98th Pennsylvania Infantry Regiment Colonel John F. Balier
102nd Pennsylvania Infantry Regiment Colonel Thomas A. Rowley
 Division Artillery
Battery C, 1st Pennsylvania Artillery
Battery D, 1st Pennsylvania Artillery
Battery E, 1st Pennsylvania Artillery
Battery H, 1st Pennsylvania Artillery

Second Division

Brigadier General William F. Smith
First Brigade Brigadier General Winfield S. Hancock
6th Maine Infantry Regiment Colonel Hiram Burnham
43rd New York Infantry Regiment Colonel Benjamin F. Baker
49th Pennsylvania Infantry Regiment Colonel William H. Irwin
5th Wisconsin Infantry Regiment Colonel Amasa Cobb
Second Brigade Brigadier General W. T. H. Brooks
2nd Vermont Infantry Regiment Colonel Henry Whiting
3rd Vermont Infantry Regiment Colonel Breed N. Hyde
4th Vermont Infantry Regiment Colonel Edwin H. Stoughton
5th Vermont Infantry Regiment Colonel Henry A. Smalley
6th Vermont Infantry Regiment Colonel Nathan Lord
Third Brigade Brigadier General J. W. Davidson
7th Maine Infantry Regiment Colonel Edwin C. Mason
33rd New York Infantry Regiment Colonel Robert F. Taylor
49th New York Infantry Regiment Colonel Daniel D. Bidwell
77th New York Infantry Regiment Colonel James B. McKean from Casey’s Div., 3rd Brig.
Division Artillery
1st New York Independent Battery Lieutenant Andrew B. Cowan
3rd New York Independent Battery Captain Thaddeus P. Mott
1st New York Artillery, Battery E Captain Charles C. Wheeler
Battery F, 5th United States Artillery Captain Romeyn B. Ayres

Third Division

Brigadier General Silas Casey
First Brigade Brigadier General 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 Charles H. Van Wyck  from New York City 3/10
52nd Pennsylvania Infantry Regiment Colonel John C. Dodge
104th Pennsylvania Infantry Regiment Colonel William W.H. Davis
Second Brigade Brigadier General William H. Keim
59th New York Infantry Regiment  Colonel William L. Tidball  to Defenses Washington
86th New York Infantry Regiment  Colonel Benjamin P. Baily  to Defenses Washington
96th New York Infantry Regiment Colonel James Fairman
85th Pennsylvania Infantry Regiment  Colonel Joshua B. Howell
101st Pennsylvania Infantry Regiment  Colonel Joseph H. Wilson from Harrisburg 2/24
103rd Pennsylvania Infantry Regiment  Colonel Theodore F. Lehmann from Harrisburg 2/27
Third Brigade Brigadier General Innis N. Palmer
81st New York Infantry Regiment Colonel Edwin Rose from New York 3/5
85th New York Infantry Regiment Colonel Jonathan S. Belknap
92nd New York Infantry Regiment Colonel Jonah Sanford from New York 3/5
93rd New York Infantry Regiment Colonel John S. Crocker from New York 3/7
98th New York Infantry Regiment Colonel William Dutton from New York 3/8
Division Artillery
Battery A, 1st New York Artillery
Battery H, 1st New York Artillery
7th New York Independent Battery
8th New York Independent Battery

Cavalry

8th Pennsylvania Cavalry Regiment Colonel David McM. Gregg  from Porter’s Division