United States Army > Army of the Potomac
March 1862 • to April >
Commanded by Major General Irvin McDowell
The First Corps was created on March 3, 1862 and announced March 13, 1862. It was transferred from the Army of the Potomac to the Department of the Rappahannock on April 4, 1862.
1st Division |
Brigadier General William B. Franklin | From Franklin’s Div. 3/3 |
| First Brigade | Brigadier General Philip Kearney | |
| 1st New Jersey Infantry Regiment | Colonel Alfred T. A. Torbert | |
| 2nd New Jersey Infantry Regiment | Colonel Isaac M. Tucker | |
| 3rd New Jersey Infantry Regiment | Colonel George W. Taylor | |
| 4th New Jersey Infantry Regiment | Colonel James H. Simpson | |
| Second Brigade | Brigadier General Henry W. Slocum | |
| 5th Maine Infantry Regiment | Colonel Nathaniel J. Jackson | |
| 16th New York Infantry Regiment | Colonel Thomas Davies (to BG 3/7) Colonel Joseph Howland |
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| 27th New York Infantry Regiment | Colonel Joseph J. Bartlett | |
| 96th Pennsylvania Infantry Regiment | Colonel Henry L. Cake | |
| Third Brigade | Brigadier General John Newton | |
| 18th New York Infantry Regiment | Colonel William H. Young | |
| 31st New York Infantry Regiment | Colonel Calvin E. Pratt | |
| 32nd New York Infantry Regiment | Colonel Roderick Matheson | |
| 95th Pennsylvania Infantry Regiment | Colonel John M. Gosline | |
| Division Cavalry and Artillery | ||
| 1st Massachusetts Battery | ||
| Battery A, 1st New Jersey Artillery | Captain William Hexamer | |
| Battery F, 1st New York Artillery | ||
| Pennsylvania Independent Battery D | Captain George W. Durell | from McDowell’s Div.; to Rappahannock, 1 Div. |
| 1st Rhode Island Artillery, Battery D | from McDowell’s Div. | |
| Battery D, 2nd United States Artillery | ||
| Battery M, 2nd United States Artillery | ||
| 1st New York Cavalry Regiment | Colonel Andrew T. McReynolds | |
2nd Division“Pennsylvania Reserves” |
Brigadier General George A. McCall | from McCall’s Div. 3/3 |
| First Brigade | Brigadier General John Reynolds | |
| 1st Pennsylvania Reserves | Colonel Richard B. Roberts | |
| 2nd Pennsylvania Reserves | Colonel William McCandless | |
| 5th Pennsylvania Reserves | Colonel Seneca G. Simmons | |
| 8th Pennsylvania Reserves | Colonel George S. Hays | |
| 13th Pennsylvania Reserves | Colonel Hugh McNeil | from 2nd Brigade (below) 3/10 |
| Second Brigade | Brigadier General George Meade | |
| 3rd Pennsylvania Reserves | Colonel Horatio G. Sickel | |
| 4th Pennsylvania Reserves | Colonel Albert L. Magilton | |
| 7th Pennsylvania Reserves | Colonel Elisha B. Harvey | |
| 11th Pennsylvania Reserves | Colonel Thomas F. Gallagher | |
| 13th Pennsylvania Reserves | Colonel Hugh McNeil | to 1st Brigade (above) 3/10 |
| Third Brigade | Brigadier General Edward O. C. Ord | |
| 6th Pennsylvania Reserves | Colonel William Sinclair | |
| 9th Pennsylvania Reserves | Colonel Conrad F. Jackson | |
| 10th Pennsylvania Reserves | Colonel John S. McCalmont | |
| 12th Pennsylvania Reserves | Colonel John H. Taggart | |
| Division Artillery and Cavalry | ||
| Battery A, 1st Pennsylvania Artillery | ||
| Battery B, 1st Pennsylvania Artillery | ||
| Battery G, 1st Pennsylvania Artillery | ||
| Battery C, 5th United States Artillery | ||
| 1st Pennsylvania Cavalry | Colonel George D. Bayard | |
3rd Division |
Brigadier General Rufus King | from McDowell’s Division 3/3 |
| First Brigade | Brigadier General Christopher C. Augur | |
| 22nd New York Infantry Regiment | Colonel Walter Phelps | |
| 24th New York Infantry Regiment | Colonel Timothy Sullivan | |
| 30th New York Infantry Regiment | Colonel Edward Frisby | |
| 14th New York State Militia | Colonel Alfred M. Wood | |
| 2nd United States Sharpshooter Regiment | Colonel Henry Post | from Washington DC defences |
| Second Brigade | Brigadier General James S. Wadsworth (to 3/17) Brigadier General Marsena Patrick |
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| 12th New York Infantry Regiment | Colonel Henry Weeks | to 3 Brig., 1 Div., 3rd Corps 3/13 |
| 21st New York Infantry Regiment | Colonel William F. Rogers | |
| 23rd New York Infantry Regiment | Colonel Henry C. Hoffman | |
| 35th New York Infantry Regiment | Colonel Newton B. Lord | |
| 80th New York Infantry Regiment | Colonel George W. Pratt | |
| Third Brigade | Colonel Lysander Cutler | |
| 2nd Wisconsin Infantry Regiment | Colonel Edgar O’Connor | |
| 6th Wisconsin Infantry Regiment | ||
| 7th Wisconsin Infantry Regiment | Colonel William W. Robinson | |
| 19th Indiana Infantry Regiment | Colonel Solomon Meredith | |
| Division Artillery and Cavalry | ||
| 1st New Hampshire Artillery, Battery D | ||
| 4th United States Artillery, Battery B | ||
| 2nd New York Cavalry Regiment | Colonel Judson Kilpatrick | |