March 1862to April >

Commanded by Brigadier General James Wadsworth

Created on March 12, 1862, to include the District of Columbia, Alexandria, Virginia, and Fort Washington, Maryland.

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