The Civil War in the East

U.S. Army

22nd Army Corps, Department of Washington

Major General Samuel Peter Heintzelman


Defences North of the Potomac

Lt. Colonel J. A. Haskins


First Brigade

Colonel A. A. Gibson


Second Brigade

Colonel L. O. Morris


Third Brigade

Colonel W. R. Pease


Defences South of the Potomac

Bde. Gen. G. A. DeRussy


First Brigade

Colonel T. R. Tannatt (until 8/11)

Col. J. N. G. Whistler


Second Brigade

Col. L. W. Wessells


Third Brigade

Colonel H. L. Abbot


Fourth Brigade

Colonel H. H. Hall (to 8/6)

Lt. Colonel T. Allcock


King's Division

Bde. Gen. Rufus King

established 7/15

First Brigade

Bde. Gen. Michael Corcoran


Independent Cavalry Brigade

Colonel C. R. Lowell, Jr.


2nd Massachusetts Cavalry Regiment


to C.M.D.M. 1st Div. Cav., Res Bde.

13th New York Cavalry Regiment



16th New York Cavalry Regiment



District of Alexandria

Brig. Gen. John P. Slough


1st District of Columbia Infantry Regt.



Pennsylvania Independent Battery H



Second Brigade, Pa. Reserves

Colonel H. G. Sickel


3rd Pennsylvania Reserves Regiment

Colonel Horation G. Sickel (^)


4th Pennsylvania Reserves Regiment

Colonel Richard H. Woolworth


7th Pennsylvania Reserves Regiment

Colonel Henry C. Bolinger


8th Pennsylvania Reserves Regiment

Colonel Silas M. Baily


District of Washington

Bde. Gen. J. H. Martindale


2nd District of Columbia Infantry Regt.

Colonel Charles M. Alexander


34th Massachusetts Infantry Regiment

Colonel George D. Wells

to W. Va., Maryland Heights Div.

39th Massachusetts Infantry Regiment

Colonel Phineas Stearns Davis

to 1st Corps, 2nd Div., 1st Bde.

14th New Hampshire Infantry Regiment

Colonel Robert Wilson


153rd New York Infantry Regiment

Colonel Edwin P. Davis


178th New York Infantry Regiment


from Defenses S. Potomac, 3rd Bde.

150th Pennsylvania Infantry, Co. K



157th Pennsylvania Infantry (4 cos.)



Light Artillery Camp Camp Berry

Bde. Gen. A. P. Howe


2nd Connecticut Light Battery


to Department of the East, New York City

1st Delaware Battery


to Department of the East, New York City

7th Massachusetts Battery



1st Michigan Artillery, Battery K



1st New York Artillery, Battery F



1st New York Artillery, Battery H



4th New York Independent Battery



10th New York Independent Battery



19th New York Independent Battery



12th Ohio Independent Battery



1st Pennsylvania Artillery, Battery H



Pennsylvania Independent Battery D


to West Virginia, Maryland Heights Div.

1st West Virginia Artillery, Battery F



5th United States Artillery, Battery I



5th United States Artillery, Battery L


from 8th Corps, 3rd Separate Bde.

About the Author • ©2015 Steve Hawks