< to May • June 1865 to July >

Commanded by:
Major General C. C. Augur (to June 7)
Major General John G. Parke (to June 25)
Major General C. C. Augur

The Department of Washington was disconsinued on June 27.

Defences North of the Potomac Brigadier General Martin D. Hardin
First Brigade Colonel C.H. Long
Colonel E.G. Marshall
New Hampshire Heavy Artillery mustered out
13th Michigan Battery to MI 6/15
4th United States Artillery, Battery A to Regular Army
Second Brigade Colonel W.S. Abert
3rd Massachusetts Heavy Artillery mustered out 9/18
Third Brigade Major C.S. Worcester
Colonel R.B. Shepherd
Massachusetts Heavy Artillery, 3 Cos. mustered out
14th Michigan Battery to MI to mueter out
1st Ohio Independent Battery mustered out 6/26
Pennsylvania Independent Battery F mustered out 6/26
Fort Foote
1st Pennsylvania Artillery, Battery G Lieutenant Eugene Moore mustered out 6/29
2nd United States Artillery, Battery I to Regular Army
3rd United States Artillery, Battery G to Regular Army
Defences South of the Potomac Brigadier General Gustavus A. DeRussy
First Brigade Colonel J.N.G. Whistler
16th Indiana Battery to IN to muster out
Maryland Artillery, Battery D mustered out 6/24
1st New York Artillery, Battery F mustered out 6/17
1st New York Artillery, Battery K Captain Walter Stocking mustered out 6/20
1st Pennsylvania Artillery, Battery H Captain Lord Richards mustered out 6/27
6th Pennsylvania Heavy Artillery, Cos. E&H mustered out 6/13
Pennsylvania Independent Battery I mustered out 6/23
1st United States Artillery, Batteries A&F to Regular Army
1st United States Artillery, Battery E to Regular Army
2nd United States Artillery, Battery G to Regular Army
1st West Virginia Artillery, Battery C mustered out 6/28
Second Brigade Colonel Charles Barnes (to 6/26)
Colonel J. Hubbard
2nd Connecticut Heavy Artillery Colonel J. Hubbard from 2 Brig. 1 Div. 6 Corps
6th Pennsylvania Heavy Artillery (6 cos.) mustered out 6/26
Third Brigade Colonel W.S. King
4th Massachusetts Heavy Artillery Colonel W.S. King mustered out 6/17
6th Pennsylvania Heavy Artillery, Cos. C&M mustered out 6/26
Fourth Brigade Colonel C.C. Meservey
15th New York Heavy Artillery Major J. Dieckmann mustered out 8/22
1st Wisconsin Heavy Artillery, Cos. E-M mustered out 6/26
District of Washington Colonel M. N. Wisewell mustered out by detachments
150th Pennsylvania Infantry, Co. K Captain David Derickson Lincoln’s Bodyguard
1st Brigade Colonel G. W. Gile
1st Regiment Veteran Reserve Corps Colonel R.H. Rush
4th Regiment Veteran Reserve Corps Colonel M.N. Wisewell
6th Regiment Veteran Reserve Corps
7th Regiment Veteran Reserve Corps
9th Regiment Veteran Reserve Corps Colonel G.W. Gile
10th Regiment Veteran Reserve Corps
18th Regiment Veteran Reserve Corps
19th Regiment Veteran Reserve Corps
21st Regiment Veteran Reserve Corps
22nd Regiment Veteran Reserve Corps
24th Regiment Veteran Reserve Corps Colonel W.H. Browne
District of Alexandria Major General John G. Parke
discontinued 7/20
2nd District of Columbia Infantry Regiment Colonel William Graham mustered out 9/12
26th Michigan Infantry, Company F mustered out 6/4
201st Pennsylvania Infantry Regiment Colonel F. Asbury Awl to Fort Delaware
12th Regiment Veteran Reserve Corps Colonel A. Farnsworth
3rd United States Artillery, Battery L to Regular Army
First Separate Brigade Colonel William Gamble
8th Illinois Cavalry Regiment to St. Louis
16th Massachusetts Battery to MA to muster out
13th New York Cavalry (Companies A-F) Lieutenant Colonel Henry S. Gansevoort to 3rd Prov. Cav.
16th New York Cavalry (Companies A-D) to 13th New York Cavalry
5th Pennsylvania Heavy Artillery Colonel George S. Gallupe to Pittsburgh to muster out
Light Artillery Camp (Camp Barry) Lieutenant Colonel J.A. Hall
Baltimore MD Independent Battery mustered out 6/17
30th New York Independent Battery mustered out 6/23
Pennsylvania Independent Battery H Captain Edward Nevin mustered out 6/18
West Virginia Battery E mustered out 6/28
3rd United States Artillery, Battery I to Regular Army
4th United States Artillery, Battery A to Regular Army
4th United States Artillery, Batteries F&H to Regular Army
4th United States Artillery, Battery G to Regular Army
5th United States Artillery, Battery I to Regular Army
5th United States Artillery, Battery M to Regular Army