U.S. Army - Army of the Potomac

Dix's Division, Baltimore

Major General John Dix

Infantry

1st Delaware Infantry Regiment

mustered out 8/30

20th Indiana Infantry Regiment

from Lafayette, In. 8/2

21st Indiana Infantry Regiment

17th Massachusetts Infantry Regiment

from Lynnfield, Ma. 8/23

7th Maine Infantry Regiment

From Augusta, Me., 8/23

3rd New York Infantry Regiment

Lt. Colonel Samuel M. Alford

promoted colonel 8/26

4th New York Infantry Regiment

Colonel Alfred W. Taylor

5th New York Infantry Regiment

Colonel C. Schwartzwaelder

13th New York Infantry Regiment

Colonel Abel Smith

left for Brooklyn to muster out 8/6

20th New York State Militia

Colonel George W. Pratt

left for Kingston to muster out 8/3

1st Pennsylvania Reserves

Colonel R. Biddle Roberts

12th Pennsylvania Infantry Regiment

Colonel David Campbell

left for muster out 8/5

19th Pennsylvania Infantry Regiment

Colonel Peter Lyle

left to muster out 8/29

22nd Pennsylvania Infantry Regiment

Colonel Turner G. Morehead

left to muster out 8/7

Artillery

Cook's Boston, Ma. Battery

mustered out 8/2

Battery I, 2nd United States Artillery

at Fort McHenry, April 1861