A reference guide to America's Civil War in the East
U.S. Army
Major General Samuel P. Heintzelman
Lt. Col. J. A. Haskins
First Brigade
Colonel J. M. Warner (to 5/12)
Colonel W. H. Hayward
Second Brigade
Colonel L. O. Morris
Third Brigade
Colonel A. Piper
Col. T. R. Tannatt (until 5/25)
Brig. Gen. G. A. DeRussy
Colonel T. R. Tannatt
Colonel G. D. Wells (until 5/63)
Col. L. W. Wessells
Colonel H. L. Abbot
organized 5/12
Brigadier General J. J. Abercrombie
Col. Francis Fessenden
Brig. Gen. George J. Stannard
Colonel George L. Willard (to 5/6)
Brig. Gen. Alexander Hays
Brig. Gen. Samuel W. Crawford
Colonel William Sinclair (to 5/29)
Colonel William McCandless
Colonel J. W. Fisher
Major General Julius Shahel
Brig. Gen. J. T. Copeland
Colonel R. Butler Price
Colonel O. DeForest
Colonel A. B. Jewett
23rd Maine Infantry Regiment
to District Alexandria (see below)
39th Massachusetts Infantry Regiment
to District Washington (see below)
14th New Hampshire Infantry Regiment
10th Vermont Infantry Regiment
11th New York Cavalry, Cos. E, F & I
10th Massachusetts Independent Battery
Brig. Gen. J. H. Martindale
2nd District of Columbia Infantry Regt.
34th Massachusetts Infantry Regiment
from Defences S. Potomac, 3rd Brig. (below)
from Jewett's Independent Brig. (see above)
27th Pennsylvania Infantry, Co. F
150th Pennsylvania Infantry, Co. K
157th Pennsylvania Infantry (4 cos.)
Brig. Gen. John P. Slough
1st District of Columbia Infantry Regt.
153rd New York Infantry Regiment
Pennsylvania Independent Battery H
Colonel H. G. Sickel
3rd Pennsylvania Reserves Regiment
4th Pennsylvania Reserves Regiment
7th Pennsylvania Reserves Regiment
8th Pennsylvania Reserves Regiment
Brig. Gen. A. P. Howe
1st New York Artillery, Battery A
12th New York Independent Battery
27th New York Independent Battery
1st West Virginia Artillery, Battery A