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Commanded by Brigadier General James Wadsworth

The Military District of Washington was transferred to the newly created Department of the Rappahannock on April 4, 1862.

Infantry
2nd District of Columbia Infantry Regt.
10th New Jersey Infantry Regiment	Colonel William R. Murphy
26th New York Infantry Regiment	Colonel William H. Christian
59th New York Infantry Regiment	Colonel William L. Tidball
76th New York Infantry Regiment	Colonel Nelson W. Green
86th New York Infantry Regiment	Colonel Benajah P. Bailey
94th New York Infantry Regiment	Colonel Henry K. Viele
95th New York Infantry Regiment	Colonel George H. Biddle
97th New York Infantry Regiment	Colonel Charles Wheelock
101st New York Infantry Regiment	Colonel Enrico Fardella
104th New York Infantry Regiment	Colonel John Rorbach
105th New York Infantry Regiment	Colonel James M. Fuller	from New York 4/4
11th Pennsylvania Infantry Regiment	Colonel Richard Coulter	from Middle Department 4/9
56th Pennsylvania Infantry Regiment	Colonel Sullivan A. Meredith
88th Pennsylvania Infantry Regiment	Colonel George P. McLean
91st Pennsylvania Infantry Regiment	Colonel Edgar M. Gregory
99th Pennsylvania Infantry Regiment	Colonel Thomas W. Sweney
107th Pennsylvania Infantry Regiment	Colonel Thomas A. Ziegle
Artillery
1st Massachusetts Heavy Artillery
4th Maine Battery		from Maine 4/3
5th Maine Battery		from Maine 4/3
6th Maine Battery		from Maine 4/3
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		to Department of North Carolina
1st New York Artillery, Battery C
1st New York Artillery, Battery K		to Middle Dept., Railroad Brig.
9th New York Independent Battery
10th 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 Battery
1st Wisconsin Heavy Artillery
Cavalry
1st New Jersey Cavalry Regiment	Colonel Andrew T. McReynolds
6th New York Cavalry Regiment	Colonel Thomas C. Devin
10th New York Cavalry Regiment	Colonel John C. Lemmon
2nd Pennsylvania Cavalry Regiment	Colonel Richard B. Price	from Middle Dept. Baltimore 4/25
4th Pennsylvania Cavalry Regiment	Colonel James H. Childs
12th Pennsylvania Cavalry Regiment	Colonel William Frishmuth (re. 4/20) Colonel Lewis B. Pierce