22nd Army Corps, Department of Washington

Major General C. C. Augur

Defences North of the Potomac

Brigadier General Martin D. Hardin

First Brigade

Lt. Colonel T. Allcock (to 10/1)

Major G.S. Worcaster

Second Brigade

Lt. Colonel H.G. Thomas

Third Brigade

Lt. Colonel J.H. Oberteuffer

Defences South of the Potomac

Bde. Gen. G. A. DeRussy

First Brigade

Colonel J.N.G. Whistler

Second Brigade

Lt. Colonel James Brady (to 11/14)

Colonel Charles Barnes

Third Brigade

Lt. Colonel I. McL. Barron (to 11/12)

Lt. Colonel James Brady

Fourth Brigade

Colonel C.C. Meservey

Independent Cavalry Brigade

Colonel H.M. Lazelle

Colonel H. S. Ganzevoort

13th New York Cavalry Regiment

16th New York Cavalry Regiment

District of Alexandria

Brig. Gen. John P. Slough

4th Delaware Infantry Regiment

1st District of Columbia Infantry Regt.

26th Michigan Infantry, Company F

201st Pennsylvania Infantry Regiment

from Pennsylvania

202nd Pennsylvania Infantry Regiment

from Pennsylvania

5th Pennsylvania Heavy Artillery

from Pennsylvania

6th Pennsylvania Heavy Artillery

from Pennsylvania

Pennsylvania Independent Battery H

St. Mary's District

Bde. Gen. James Barnes

5th Massachusetts Cavalry Regiment

2nd Wisconsin Battery

District of Washington

Colonel M. N. Wisewell

First Brigade

Colonel G. W. Gile

150th Pennsylvania Infantry, Co. K

Light Artillery Camp Camp Berry

Major J. A. Hall (except 10/12 - 10/26)

Bde. Gen. A. P. Howe (10/12 - 10/26)

16th Massachusetts Battery

1st United States Artillery, Batteries A&E

3rd United States Artillery, Batteries L&M

4th United States Artillery, Battery A

5th United States Artillery, Battery I