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 |
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| 5th Pennsylvania Cavalry Regiment | Colonel Max Friedman (res. 3/9) Colonel David Campbell |
from Smith’s Division |
| 8th Pennsylvania Cavalry Regiment | Colonel David McM. Gregg | from Porter’s Division |