United States Army > Army of the Potomac
< to February • March 1864 • to April >
Commanded by:
Major General George Sykes (to 3/23)
Major General Gouverneur K. Warren
On March 23-25 the First Corps was dissolved and merged into the Fifth Corps. The existing Second Division of the Fifth Corps (the badly depleted U.S. Regulars) was consolidated into a single brigade which became the Fourth Brigade of the First Division. A new Fourth Division was created from three First Corps Brigades.
Provost Guard |
||
| 12th New York Infantry, Cos. D&F | Major Henry W. Ryder | |
First Division |
Brigadier General J. J. Bartlett |
|
| First Brigade | Colonel W. S. Tilton (to 3/25) |
|
| 18th Massachusetts Infantry Regiment | to 3 Brig. (below) | |
| 22nd Massachusetts Infantry Regiment | to 2 Brig. (below) | |
| 1st Michigan Infantry Regiment | Lieutenant Colonel William A. Throop | to 3 Brig. (below) |
| 118th Pennsylvania Infantry Regiment | Lieutenant Colonel James Gwynn | to 3 Brig. (below) |
| Second Brigade | Colonel J. B. Sweitzer Colonel J. Hayes |
|
| 9th Massachusetts Infantry Regiment | Colonel Patrick R. Guiney (after 2/3) | |
| 22nd Massachusetts Infantry Regiment | from 1 Brig. (above) | |
| 32nd Massachusetts Infantry Regiment | Lieutenant Colonel Luther Stephenson | |
| 4th Michigan Infantry Regiment | Lieutenant Colonel George Lumbard | |
| 62nd Pennsylvania Infantry Regiment | Lieutenant Colonel James C. Hull | |
| Third Brigade | Colonel J. Hayes |
|
| 20th Maine Infantry Regiment | ||
| 18th Massachusetts Infantry Regiment | from 1 Brig. (above) | |
| 1st Michigan Infantry Regiment | Lieutenant Colonel William A. Throop | from 1 Brig. (above) |
| 16th Michigan Infantry Regiment | Lieutenant Colonel Norval E. Welch | |
| 44th New York Infantry Regiment | Lieutenant Colonel Freeman Conner | |
| 83rd Pennsylvania Infantry Regiment | Major William H. Lamont | |
| 118th Pennsylvania Infantry Regiment | Lieutenant Colonel James Gwynn | from 1 Brig. (above) |
| Fourth Brigade | Brigadier General Romeyn Ayers | organized 3/25 |
| Lieutenant Colonel Louis Ernst | ||
| Colonel David T. Jenkins | from 2 Div. 3 Brig. (below) | |
| Lieutenant Colonel Joseph H. Sinex | from 2 Div. 3 Brig. (below) | |
| Lieutenant Colonel John H. Cain | from 2 Div. 3 Brig. (below) | |
| 2nd United States Infantry Regiment | Captain Samuel A. McKee | from 2 Div. 1 Brig. (below) |
| Major DeLancey Floyd-Jones | from 2 Div. 1 Brig. (below) | |
| Captain Thomas S. Dunn | from 2 Div. 1 Brig. (below) | |
| Major Grotius R. Giddings | from 2 Div. 1 Brig. (below) | |
| Lieutenant Colonel James D. Greene | from 2 Div. 1 Brig. (below) | |
Second DivisionBefore Reorganization on March 23 |
Brigadier General Romeyn B. Ayres |
to 1 Div. 4 Brig. (above) |
| First Brigade (until 3/23) | Major L. B. Brown |
|
| 2nd United States Infantry Regiment Companies B, C, F, I & K |
Captain Samuel A. McKee | to 1 Div. 4 Brig. |
| 11th United States Infantry Regiment 1st Bn. Companies B, C, D, E, F & G 2nd Bn. Companies C & D |
Major DeLancey Floyd-Jones | to 1 Div. 4 Brig. |
| 12th United States Infantry 1st Bn. Companies A, B, C, D & G 2nd Bn. Companies A, C & D |
Captain Thomas S. Dunn | to 1 Div. 4 Brig. |
| 14th United States Infantry 1st Bn. Companies A, B, D, E, F & G 2nd Bn. Companies F & G |
Major Grotius R. Giddings | to 1 Div. 4 Brig. |
| 17th United States Infantry Regiment 1st Bn. Companies A, C, D, G & H 2nd Bn. Companies A & B |
Leutenant Colonel James D. Greene | to 1 Div. 4 Brig. |
| Third Brigade (until 3/23) | Colonel George Ryan |
|
| 140th New York Infantry Regiment | Lieutenant Colonel Louis Ernst | to 1 Div. 4 Brig. |
| 146th New York Infantry Regiment | Colonel David T. Jenkins | to 1 Div. 4 Brig. |
| 91st Pennsylvania Infantry Regiment | Lieutenant Colonel Joseph H. Sinex | to 1 Div. 4 Brig. |
| 155th Pennsylvania Infantry Regiment | Lieutenant Colonel John H. Cain | to 1 Div. 4 Brig. |
Second DivisionAfter Reorganization on March 23 |
Brigadier General Henry Baxter |
|
| First Brigade (after 3/23) | Colonel Samuel H. Leonard |
|
| 16th Maine Infantry Regiment | Lieutenant Colonel Charles W. Tilden | from 1 Corps, 2 Div. 1 Brig. |
| 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 | |
| 3rd United States Infantry Regiment | Captain Andrew Sheridan | |
| Second Brigade (after 3/23) | Brigadier General H. Baxter | |
| 12th Massachusetts Infantry Regiment | Major Benjamin F. Cook | from 1 Corps, 2 Div. 2 Brig. |
| 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 Brigade (after 3/23) | Colonel Nathan T. DuShane |
|
| 1st Maryland Infantry Regiment | Lieutanant Colonel John W. Wilson | from 1 Corps, 3 Div. 2 Brig. |
| 4th Maryland Infantry Regiment | Colonel Richard N. Bowerman | |
| 7th Maryland Infantry Regiment | Colonel Charles E. Phelps | |
| 8th Maryland Infantry Regiment | Colonel Andrew W. Denison | |
Third Division |
Colonel William McCandless | |
| First Brigade | Colonel William O. Talley |
|
| 1st Pensylvania Reserves Regiment | ||
| 2nd Pensylvania Reserves Regiment | Lieutenant Colonel George A. Woodward | |
| 6th Pensylvania Reserves Regiment | Lieutenant Colonel Wellington H. Ent | |
| 11th Pensylvania Reserves Regiment | Colonel Samuel M. Jackson | |
| 1st Pennsylvania Rifles (13th Reserves) | Major William R. Hartshorne | |
| Third Brigade | Colonel Joseph W. Fisher |
|
| 5th Pensylvania Reserves Regiment | Lieutenant Colonel George Dare | |
| 9th Pensylvania Reserves Regiment | Lieutenant Colonel James M. Snodgrass | |
| 10th Pensylvania Reserves Regiment | Colonel Adironiram J. Warner | |
| 12th Pensylvania Reserves Regiment | ||
Fourth Division |
Brigadier General James Wadsworth | created 3/25 |
| First Brigade (“Iron Brigade”) | Brigadier General Lysander Cutler | |
| 19th Indiana Infantry Regiment | Colonel Samuel J. Williams | from 1 Corps 1 Div. 1 Brig. |
| 24th Michigan Infantry Regiment | Colonel Henry A. Morrow | |
| 1st New York Sharpshooter Battalion | Captain Joseph C. Arnold | |
| 2nd Wisconsin Infantry Regiment | Colonel William W. Robinson | |
| 6th Wisconsin Infantry Regiment | Colonel Edward Bragg | |
| 7th Wisconsin Infantry Regiment | Major Mark Finnicum | |
| Second Brigade | Brigadier General J. C. Rice | |
| 7th Indiana Infantry Regiment | Colonel Ira G. Grover | from 1 Corps 1 Div. 2 Brig. |
| 14th New York State Militia (84th N.Y.) | Colonel Edward B. Fowler | |
| 76th New York Infantry Regiment | Major John W. Young | |
| 95th New York Infantry Regiment | Major Edward Pye | |
| 147th New York Infantry Regiment | Major George Harney | |
| 56th Pennsylvania Infantry Regiment | Colonel J. W. Hoffman | |
| Third Brigade | Colonel Roy Stone |
|
| 121st Pensylvania Infantry Regiment | Major Alexander Biddle | from 1 Corps 3 Div. 2 Brig. |
| 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 | |
Artillery |
Captain Augustus P. Martin | |
| 3rd Massachusetts Battery | Lieutenant Aaron F. Walcott | |
| 5th Massachusetts Battery | Captain Charles A Phillips | |
| 1st New York Artillery, Battery C | Captain Almont Barnes | to Artilery Reserve, 3rd Brig. |
| 1st New York Artillery, Battery D | from 1st Corps Artilery | |
| 1st New York Artillery, Battery E | from 1st Corps Artilery | |
| 1st New York Artillery, Battery H | from 1st Corps Artilery | |
| 1st New York Artillery, Battery L | from 1st Corps Artilery | |
| 4th New York Heavy Artillery, 2nd Battalion | from 22 Corps, DeRussey’s Div., 3rd Brig. | |
| 1st Ohio Artillery, Battery L | Captain Frank C. Gibbs | |
| 1st Pennsylvania Artillery, Battery B | from 1st Corps Artilery | |
| 3rd United Artillery, Batteries F & K | Lieutenant John C. Turnbull | to Army Artillery Reserve |
| 4th United Artillery, Battery B | from 1st Corps Artilery | |
| 5th United Artillery, Battery D | ||