U.S. Army - Army of the Potomac - Second Army Corps

Third Division

Major General D. B. Birney (until 7/23)

Brigadier General Gershom Mott (after 7/23)

First Brigade

Colonel H. J. Madill (until 7/12)

Bde. Gen. Regis DeTrobriand (after 7/12)

20th Indiana Infantry Regiment

1st Maine Heavy Artillery

from 3rd Bde. (see below)

40th New York Infantry Regiment

Captain Madison M. Cannon

73rd New York Infantry Regiment

from 4th Bde. (see below)

74th New York Infantry Regiment

from 4th Bde. (see below)

86th New York Infantry Regiment

124th New York Infantry Regiment

4th New York Heavy Artillery, 1st Bn.

to Army Artillery Reserve

99th Pennsylvania Infantry Regiment

110th Pennsylvania Infantry Regiment

141st Pennsylvania Infantry Regiment

to 2nd Bde. (see below)

17th Maine Infantry Regiment

2nd United States Sharpshooters

Second Brigade

Bde. Gen. Byron R Pierce (until 7/22)

Colonel Daniel Chaplin (7/22 - 7/28)

Colonel H. J Madill (after 7/28)

1st Massachusetts Heavy Artillery

5th Michigan Infantry Regiment

93rd New York Infantry Regiment

4th New York Heavy Artillery, 2nd Bn.

to Army Artillery Reserve

57th Pennsylvania Infantry Regiment

63rd Pennsylvania Infantry Regiment

84th Pennsylvania Infantry Regiment

from 4th Bde. (see below)

105th Pennsylvania Infantry Regiment

141st Pennsylvania Infantry Regiment

1st United States Sharpshooters

Third Brigade

Bde. Gen. Gershom Mott (until 7/23)

Colonel R. McAllister (after 7/23)

1st Maine Heavy Artillery

to 1st Bde. (see above)

11th Massachusetts Infantry Regiment

from 4th Bde. (see below)

16th Massachusetts Infantry Regiment

left front to muster out 7/11

5th New Jersey Infantry Regiment

formed Veteran Battalion 9/7

120th New York Infantry Regiment

from 4th Bde. (see below)

Fourth Brigade

Colonel William R. Brewster

discontinued 7/3

11th Massachusetts Infantry Regiment

to 3rd Bde. (see above)

71st New York Infantry Regiment

mustered out in New York 7/30

73rd New York Infantry Regiment

to 1st Bde. (see above)

74th New York Infantry Regiment

to 1st Bde. (see above)

120th New York Infantry Regiment

to 3rd Bde. (see above)

84th Pennsylvania Infantry Regiment

to 2nd Bde. (see above)