United States Army > Army of the Potomac
< to February • March 1864
Commanded by Major General John Newton
The First Corps was discontinued and merged into the Fifth Corps on March 24, 1864.
| Headquarters Escort | ||
| 1st Maine Cavalry, Co. L | Captain Constantine Taylor | |
First Division |
Brigadier General L. Cutler (until 3/20) Brigadier General J.C. Rice |
to 5 Corps, 4 Div. |
| First Brigade “Iron Brigade” | Colonel William W. Robinson | became 1 Brig. 4 Div. 5 Corps 3/25 |
| 19th Indiana Infantry Regiment | Colonel Samuel J. Williams | |
| 24th Michigan Infantry Regiment | Colonel Henry A. Morrow | |
| 1st New York Sharpshooter Battalion | Captain Joseph C. Arnold | |
| 76th New York Infantry Regiment | Major John W. Young | to 2 Brig. (below) 3/6 |
| 2nd Wisconsin Infantry Regiment | Lieutenant Colonel John Mansfield | |
| 6th Wisconsin Infantry Regiment | Colonel Edward Bragg | |
| 7th Wisconsin Infantry Regiment | Major Mark Finnicum | |
| Second Brigade | Brigadier General J. C. Rice | became 2 Brig. 4 Div. 5 Corps 3/25 |
| 7th Indiana Infantry Regiment | Colonel Ira G. Grover | |
| 14th New York State Militia (84th N.Y.) | Colonel Edward B. Fowler | |
| 76th New York Infantry Regiment | Major John W. Young | from 1 Brig. (above) 3/6 |
| 95th New York Infantry Regiment | Major Edward Pye | |
| 147th New York Infantry Regiment | Major George Harney | |
| 56th Pennsylvania Infantry Regiment | Colonel J. W. Hoffman | |
Second Division |
Brigadier General John C. Robinson | to 5 Corps, 2 Div. |
| 1st Brigade | Colonel S. H. Leonard | |
| 16th Maine Infantry Regiment | Lieutenant Colonel Charles W. Tilden | |
| 13th Massachusetts Infantry Regiment | ||
| 39th Massachusetts Infantry Regiment | Colonel Phineas S. Davis | |
| 104th New York Infantry Regiment | Colonel Gilbert G. Prey | |
| 107th Pennsylvania Infantry Regiment | Major Henry J. Shaefer | |
| Second Brigade | Brigadier General H. Baxter | |
| 12th Massachusetts Infantry Regiment | Major Benjamin F. Cook | |
| 83rd New York Infantry (9th NYSM) | Colonel Joseph A. Moesch | |
| 97th New York Infantry Regiment | Major Charles Northrup | |
| 11th Pennsylvania Infantry Regiment | Colonel R. Coulter | |
| 88th Pennsylvania Infantry Regiment | Captain Edmund Y. Patterson | |
| 90th Pennsylvania Infantry Regiment | Lieutenant Colonel William A. Leech | |
Third Division |
Brigadier General John R. Kenly | |
| 1st Brigade | Colonel E. L. Dana | to 5 Corps 4 Div. 3 Brig. |
| 121st Pensylvania Infantry Regiment | Major Alexander Biddle | |
| 142nd Pensylvania Infantry Regiment | Lieutenant Colonel Alfred B. McCalmont | |
| 143rd Pensylvania Infantry Regiment | ||
| 149th Pensylvania Infantry Regiment | Lieutenant Colonel Walton Dwight | |
| 150th Pensylvania Infantry Regiment | Captain Horatio Bell | |
| Second Brigade | Colonel Nathan T. Dushane | to 5 Corps 2 Div. 3 Brig. |
| 1st Maryland Infantry Regiment | Lieutanant Colonel John W. Wilson | |
| 4th Maryland Infantry Regiment | Colonel Richard N. Bowerman | |
| 7th Maryland Infantry Regiment | Colonel Edwin H. Webster | |
| 8th Maryland Infantry Regiment | Colonel Andrew W. Denison | |
Corps Artillery |
Colonel Charles Wainwright | to Army Artillery Reserve |
| Maryland Battery A | Lieutenant Thomas Binyon | |
| 5th Maine Battery | Captain Greenleaf T. Stevens | |
| 1st New York Artillery, Batteries E & L | Captain Gilbert H. Reynolds | |
| Battery H, 1st New York Artillery | ||
| 1st Pennsylvania Artillery, Battery B | Captain James H. Cooper | |
| 4th United States Artillery, Battery B | Lieutenant James Stewart | |