| Defenses North of the Potomac |
Lieutenant Colonel Joseph A. Haskin |
|
| First Brigade |
Colonel Augustus A. Gibson |
|
| 3rd Maine Battery |
|
|
| 2nd Pennsylvania Heavy Artillery |
Colonel Augustus A. Gibson |
|
| 143rd Pennsylvania Infantry Regiment |
Colonel Edmund L. Dana |
to Army Potomac, 1 Corps, 3 Div. 2 Brig. |
| 1st Vermont Heavy Artillery Regiment |
Colonel James M. Warner |
|
| Second Brigade |
Colonel Lewis O. Morris |
|
| 16th Indiana Battery |
|
|
18th Maine Infantry Regiment/
1st Maine Heavy Artillery Regiment |
Colonel Daniel Chaplin |
serving as heavy artillery;
redesignated 1/6 |
| 7th New York Heavy Artillery Regiment |
Colonel Lewis O. Morris |
|
| 9th New York Heavy Artillery Regiment |
Colonel Joseph Welling |
|
| 22nd New York Independent Battery |
Captain John D. Numan |
|
| 117th New York Infantry, 2nd Battalion |
Colonel William R. Pease |
|
| Third Brigade |
Colonel William R. Pease |
|
| 5th New York Heavy Artillery Regiment |
Colonel Samuel Graham |
|
| 10th New York Heavy Artillery Regiment |
|
|
| 117th New York Infantry, 1st Battalion |
Colonel William R. Pease |
|
| District of Alexandria |
Brigadier General John P. Slough |
|
| 1st District of Columbia Infantry Regt. |
|
|
| 26th Michigan Infantry Regiment |
Colonel Judson S. Farrar |
|
| 153rd New York Infantry Regiment |
Colonel Duncan McMartin |
|
| 11th Rhode Island Infantry Regiment |
Colonel Horatio Rogers |
|
| District of Alexandria Artillery |
Brigadier General John Tyler |
|
| 1st Connecticut Heavy Artillery |
|
|
| 19th Connecticut Infantry Regiment |
|
|
| 1st Massachusetts Heavy Artillery |
Colonel Thomas R. Tannatt |
|
| 34th Massachusetts Infantry Regiment |
Colonel George D. Wells |
|
| 2nd New York Heavy Artillery Regiment |
Colonel Gustave Wagner |
|
| 1st Wisconsin Heavy Artillery |
|
|
| Abercrombies’ Division |
Brigadier General John J. Abercrombie |
|
| Provisional (First) Brigade |
Colonel Clarence Buell |
|
| 152nd New York Infantry Regiment |
Colonel Leonard Boyer |
|
| 153rd New York Infantry Regiment |
Colonel Duncan McMartin |
|
| 169th New York Infantry Regiment |
Lieutenant Colonel John McConihe |
|
| Second Brigade |
Brigadier General R. Cowden |
|
| 22nd Connecticut Infantry Regiment |
Colonel George S. Burnham |
|
| 40th Massachusetts Infantry Regiment |
Colonel Burr B. Porter |
|
| 141st New York Infantry Regiment |
Colonel Samuel G. Hatheway |
|
| 16th West Virginia Infantry Regiment |
|
|
| Third Brigade |
Colonel William Gurney |
|
| 127th New York Infantry Regiment |
Lieutenant Colonel Stewart Woodford |
|
| 142nd New York Infantry Regiment |
Colonel Roscius W. Judson (to 1/21)
Colonel Newton M. Curtis |
|
| 143rd New York Infantry Regiment |
Colonel David P. De Witt |
|
| 144th New York Infantry Regiment |
Colonel Robert S. Hughston |
|
| Artillery |
|
|
| 9th Massachusetts Battery |
Captain John Bigelow |
|
| 17th New York Independent Battery |
Captain George T. Anthony |
|
| 4th New York Heavy Artillery Regiment |
Colonel Gustavus A. DeRussy |
|
| Casey’s Division |
Major General Silas Casey |
|
| First Brigade |
Colonel Dexter Wright |
|
| 25th Maine Infantry Regiment |
Colonel Francis Fessenden |
|
| 27th Maine Infantry Regiment |
Colonel Rufus Tapley |
|
| Second Brigade |
Brigadier General E. H. Stoughton
|
|
| 12th Vermont Infantry Regiment |
Colonel Asa P. Blunt |
|
| 13th Vermont Infantry Regiment |
Colonel Francis V. Randall |
|
| 14th Vermont Infantry Regiment |
Colonel William T. Nicholls |
|
| 15th Vermont Infantry Regiment |
|
|
| 16th Vermont Infantry Regiment |
Colonel Wheelock G. Veazey |
|
| 2nd Connecticut Independent Battery |
Captain John William Sterling |
to Artillery (below) |
| 1st Rhode Island Light Artillery, Battery H |
|
to Artillery (below) |
| Third Brigade |
Brigadier General Alexander Hays
|
|
| 39th New York Infantry Regiment |
|
from parole, Camp Douglas IL. |
| 111th New York Infantry Regiment |
|
from parole, Camp Douglas IL. |
| 125th New York Infantry Regiment |
|
from parole, Camp Douglas IL. |
| 126th New York Infantry Regiment |
|
from parole, Camp Douglas IL. |
| 151st Pennsylvania Infantry Regiment |
Colonel Harrison Allen |
to Army Potomac 1 Corps, 3. Div., 1 Brig. |
| 11th Massachusetts Independent Battery |
|
to Artillery (below) |
| Keystone (PA) Battery |
|
to Artillery (below) |
| Artillery |
|
|
| 2nd Connecticut Independent Battery |
Captain John William Sterling |
from 2 Brig. (above) |
| 11th Massachusetts Independent Battery |
|
from 3 Brig. (above) |
| Keystone (PA) Battery |
|
from 3 Brig. (above) |
| 1st Rhode Island Light Artillery, Battery H |
|
from 2 Brig. (above) |
| Grover’s Brigade |
Colonel A. B. Jewett
|
|
| 22nd Maine Infantry Regiment |
|
|
| 23rd Maine Infantry Regiment |
|
|
| 39th Massachusetts Infantry Regiment |
|
|
| 14th New Hampshire Infantry Regiment |
Colonel Rober Wilson |
|
| 10th Vermont Infantry Regiment |
|
|
| 10th Massachusetts Battery |
|
|
| Cavalry Brigade |
Colonel R. Butler Price |
|
| 1st Michigan Cavalry Regiment |
|
|
| 5th New York Cavalry Regiment |
|
|
| 1st Ohio Cavalry, Cos. A & C |
|
|
| 2nd Pennsylvania Cavalry Regiment |
Colonel Richard B. Price |
|
| 1st Vermont Cavary Regiment |
|
|
| 1st West Virginia Cavalry (8 Cos.) |
|
|
| Railroad Guard |
|
| 11th New York Cavalry Regiment |
Colonel James B. Swain |
|
| Camp Barry, Light Artillery Camp |
General William F. Barry |
|
| 1st Delaware Battery |
|
|
| 9th Michigan Battery |
|
|
| 12th New York Independent Battery |
|
|
| 16th New York Independent Battery |
|
|
| 19th New York Independent Battery |
|
|
| 27th New York Independent Battery |
|
|
| Pennsylvania Independent Battery H |
Captain John I. Nevin |
|
| West Virginia Artillery, Battery A |
|
|
| Unassigned Infantry |
| 2nd District of Columbia Infantry Regt. |
|
|
| 10th New Jersey Infantry Regiment |
Colonel William R. Murphy |
|
| 135th Pennsylvania Infantry Regiment |
Colonel James R. Porter |
to Army Potomac 1 Corps 3 Div. 1 Brig. |
| 149th Pennsylvania Infantry Regiment |
Colonel Roy Stone |
to Army Potomac 1 Corps 3 Div. 2 Brig. |
| 150th Pennsylvania Infantry Regiment |
Colonel Langhorne Wister |
to Army Potomac 1 Corps 3 Div. 2 Brig. |
