U.S. Army - 22nd Army Corps - Department of Washington

Abercrombie's Division

Brigadier General John J. Abercrombie

the original two brigades of the division are transferred to the Department of Virginia on April 17, 1863
and are replaced by the three brigades of Casey's Division

First Brigade

Colonel Francis Fessenden

25th Maine Infantry Regiment

from Casey's Div., 1st Bde.

27th Maine Infantry Regiment

Second Brigade(until 4/17)

Colonel B. Porter

22nd Connecticut Infantry Regiment

40th Massachusetts Infantry Regiment

to Dept. Virginia 4/17

141st New York Infantry Regiment

16th West Virginia Infantry Regiment

Second Brigade(after 4/17)

Brig. Gen. George J. Stannard

12th Vermont Infantry Regiment

13th Vermont Infantry Regiment

14th Vermont Infantry Regiment

from Casey's Div., 2nd Bde.

15th Vermont Infantry Regiment

16th Vermont Infantry Regiment

Third Brigade(until 4/17)

Colonel William Gurney

127th New York Infantry Regiment

142nd New York Infantry Regiment

to Dept. Virginia 4/17

143rd New York Infantry Regiment

144th New York Infantry Regiment

Third Brigade(after 4/17)

Brig. Gen. Alexander Hays (to 4/26)

Colonel George L. Willard (after 4/26)

39th New York Infantry Regiment

111th New York Infantry Regiment

from Casey's Div., 3rd Bde.

125th New York Infantry Regiment

126th New York Infantry Regiment

Artillery

9th Massachusetts Battery

17th New York Independent Battery

2nd Connecticut Independent Battery

from Casey's Div. Artilery

11th Massachusets Independent Battery

from Casey's Div. Artilery

1st Rhode Island Light Artillery, Battery H

from Casey's Div. Artilery

Keystone (Pennsylvania) Battery

from Casey's Div. Artilery

4th New York Heavy Artillery

to Defences South Potomac 1st Bde.