< to June • July 1863 • to August >
Commanded by Major General Samuel P. Heintzelman
Defences North of the Potomac |
Lieutenant Colonel Joseph A. Haskin | |
| First Brigade | Colonel W. H. Hayward | |
| 2nd Pennsylvania Heavy Artillery | Colonel August A. Gibson | |
| 1st Vermont Heavy Artillery | Colonel James M. Warner | |
| Second Brigade | Colonel Lewis O. Morris | |
| 1st Maine Heavy Artillery | ||
| 7th New York Heavy Artillery | Colonel Lewis O. Morris | |
| 9th New York Heavy Artillery | ||
| 9th New York Independent Battery | ||
| Third Brigade | Colonel A. Piper | |
| 10th New York Heavy Artillery | ||
Defences South of the Potomac |
Brigadier General Gustavus A. DeRussy |
|
| First Brigade | Colonel T. R. Tannatt | |
| 1st Massachusetts Heavy Artillery | ||
| 2nd New York Heavy Artillery | ||
| 4th New York Heavy Artillery | to 4th Brig. (below) | |
| 5th New York Heavy Artillery, Companies I,K,L&M |
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| Second Brigade | Colonel L. W. Wessells | |
| 19th Connecticut Infantry Regiment | ||
| 16th Indiana Battery | to 3 Brig. (below) | |
| 3rd New York Heavy Artillery Battalion | Lieutenant Colonel Adam Senges | |
| Third Brigade | Colonel H. L. Abbot | |
| 16th Indiana Battery | from 2 Brig. (above) | |
| 1st Connecticut Heavy Artillery | ||
| 47th New York National Guard Regiment | Colonel Jeremiah V. Meserole | mustered out 7/23 |
| 178th New York Infantry Regiment | Lieutenant Colonel Charles F. Smith | to District of Washington (below) |
| 1st Rhode Island Artillery, Battery H | ||
| 1st Wisconsin Heavy Artillery, Bat. A | ||
| Fourth Brigade | Colonel H. H. Hall | created July |
| 4th New York Heavy Artillery | Colonel H. H. Hall | from 1st Brig. (above) |
King’s Division |
Brigadier General Rufus King | created 7/15 |
| 1st Brigade (“Corcoran Legion”) | Brigadier General Michael Corcoran | from Dep. Va., 7 Corps 1 Div. 3 Brig. |
| 155th New York Infantry Regiment | Colonel William McEvily | |
| 164th New York Infantry Regiment | Colonel James McMahon | |
| 170th New York Infantry Regiment | Colonel J.ames D. McIvor | |
| 182nd New York Infantry Regiment | Colonel Mathew Murphy | |
| Not Brigaded | ||
| 4th Delaware Infantry Regiment | Colonel A.H. Grimshaw | from Dep. Va., 4 Corps |
| 17th New York Independent Battery | from Camp Barry (below) | |
| 2nd Massachusetts Cavalry Regiment | ||
| 157th Pennsylvania Infantry (4 cos.) | from District Washington (below) | |
District of Washington |
Brigadier General J. H. Martindale | |
| 2nd District of Columbia Infantry Regiment | Colonel Charles M. Alexander | |
| 34th Massachusetts Infantry Regiment | Colonel George D. Wells | |
| 39th Massachusetts Infantry Regiment | Colonel Phineas Stearns Davis | to Army Potomac 1 Corps 2 Div. 7/9 |
| 11th New York Cavalry, Cos. E, F & I | ||
| 14th New Hampshire Infantry Regiment | Colonel Robert Wilson | |
| 153rd New York Infantry Regiment | Colonel Edwin P. Davis | from District Alexandria (below) |
| 178th New York Infantry Regiment | Lieutenant Colonel Charles F. Smith | from Defenses S. Potomac |
| 150th Pennsylvania Infantry, Co. K | Captain David Derickson | Lincoln’s Bodyguard |
| 157th Pennsylvania Infantry (4 cos.) | to King’s Division (above) | |
District of Alexandria |
Brigadier General John P. Slough | |
| Slough’s Independent Brigade | Brigadier General John P. Slough | |
| 1st District of Columbia Infantry Regiment | ||
| 23rd Maine Infantry Regiment | Colonel William W. Virgin | mustered out 7/15 |
| 153rd New York Infantry Regiment | Colonel Edwin P. Davis | to District of Washington (above) |
| Second Brigade, Pennsylvania Reserves | Colonel Horatio G. Sickel | |
| 3rd Pennsylvania Reserves Regiment | Lieutenant Colonel John Clark | |
| 4th Pennsylvania Reserves Regiment | Colonel Richard H. Woolworth | |
| 7th Pennsylvania Reserves Regiment | Colonel Henry C. Bolinger | |
| 8th Pennsylvania Reserves Regiment | Colonel Silas M. Baily | |
Light Artillery Camp (Camp Barry) |
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| 2nd Connecticut Light Battery | from Army Potomac, Arti. Res. 2 Vol. Brig. | |
| 1st Delaware Battery | from Dept. VA, 7 Corps, 1st Div. | |
| Maryland Battery B | to WV, MD Heights Div., 2 Brig. | |
| 7th Massachusetts Battery | from Dept. VA, 7 Corps, 1st Div. | |
| 10th Michigan Battery | ||
| 1st New York Artillery, Battery F | from 4 Corps Res. Art., Yorktown | |
| 1st New York Artillery, Battery H | from 4 Corps Res. Art., Yorktown | |
| 10th New York Independent Battery | Lieutenant Charles T. Bruen | from Army Potomac Art. Res, 1 Vol. Brig. |
| 12th New York Independent Battery | . | to 3 Corps, Army Potomac |
| 17th New York Independent Battery | to King’s Div. (above) | |
| 19th New York Independent Battery | ||
| 27th New York Independent Battery | . | to Dept. Susquehanna |
| 32nd New York Independent Battery | Captain Edward Grimmand | to Dept. WV, MD Heights Div. 2 Brig. |
| 12th Ohio Independent Battery | ||
| 1st Pennsylvania Artillery, Battery C | Captain Jeremiah McCarthy | 7/9 to Dept. Susquehanna, Lockwood’s Division, 1st Brig. |
| 1st Pennsylvania Artillery, Battery H | from Dept. VA. | |
| Pennsylvania Independent Battery D | ||
| Keystone (Pennsylvania) Battery | to Dept. WV, MD Heights Div. | |
| 1st West Virginia Artillery, Battery A | to Dept. WV, MD Heights Div. | |
| 1st West Virginia Artillery, Battery F | from 8 Corps, French’s Command |