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United States Army • Army of the Potomac

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March 1862 • to April >

Commanded by Brigadier General James Wadsworth

The Military District of Washington was created on March 12, 1862 to include the District of Columbia, Alexandria, Virginia, and Fort Washington, Maryland. It was transferred to the newly created Department of the Rappahannock on April 4, 1862.

Infantry
2nd District of Columbia Infantry Regt.		mustered in at Washington
10th New Jersey Infantry Regiment	Colonel William R. Murphy	from Defences Washington
26th New York Infantry Regiment	Colonel William H. Christian	from Defences Washington
59th New York Infantry Regiment	Colonel William L. Tidball	from Casey’s Div., 2 Brig.
76th New York Infantry Regiment	Colonel Nelson W. Green	from Casey’s Div., 3 Brig.
86th New York Infantry Regiment	Colonel Benajah P. Bailey	from Defenses Washington
94th New York Infantry Regiment	Colonel Henry K. Viele	from New York 3/15
95th New York Infantry Regiment	Colonel George H. Biddle	from New York 3/18
97th New York Infantry Regiment	Colonel Charles Wheelock	from New York 3/12
101st New York Infantry Regiment	Colonel Enrico Fardella	from New York 3/9
104th New York Infantry Regiment	Colonel John Rorbach	from New York 3/22
54th Pennsylvania Infantry Regiment	Colonel Jacob M. Campbell	from Harrisburg 3/1 to Middle Department, Railroad Brig.
56th Pennsylvania Infantry Regiment	Colonel Sullivan A. Meredith	from Harrisburg 3/8
88th Pennsylvania Infantry Regiment	Colonel George P. McLean	from Defenses of Wahington
91st Pennsylvania Infantry Regiment	Colonel Edgar M. Gregory	from Defenses of Washington
99th Pennsylvania Infantry Regiment	Colonel Thomas W. Sweney	from Defenses of Washington
107th Pennsylvania Infantry Regiment	Colonel Thomas A. Ziegle	from Harrisburg 3/9
Artillery
1st Massachusetts Heavy Artillery
2nd New York Heavy Artillery Regiment	Colonel Gustave Waagner
3rd New York Heavy Artillery Battalion
4th New York Heavy Artillery Regiment	Colonel Gustavus A. DeRussy
New York Rocket Battery
1st New York Artillery, Battery C
1st New York Artillery, Battery K
9th New York Independent Battery
11th New York Independent Battery
12th New York Independent Battery
16th New York Independent Battery
Pennsylvania Indpendent Battery C
2nd Pennsylvania Heavy Artillery
10th Rhode Island Artillery Battery
1st Wisconsin Heavy Artillery
Cavalry
1st New Jersey Cavalry Regiment	Colonel Andrew T. McReynolds	from Defences Washington
6th New York Cavalry Regiment	Colonel Thomas C. Devin	from Defences Washington
10th New York Cavalry Regiment	Colonel John C. Lemmon	from Middle Department, Baltimore
4th Pennsylvania Cavalry Regiment	Colonel James H. Childs	from Defences Washington