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

First Division

Major General David Birney

First Brigade

Colonel Charlesw H. T. Collis

57th Pennsylvania Infantry Regiment

Colonel Peter Sides

63rd Pennsylvania Infantry Regiment

Colonel John A. Danks

68th Pennsylvania Infantry Regiment

Colonel Andrew H. Tippin

105th Pennsylvania Infantry Regiment

Colonel Calvin A. Craig

114th Pennsylvania Infantry Regiment

Colonel Charles H.T. Collis*

141st Pennsylvania Infantry Regiment

Colonel Henry J. Madill

Second Brigade

Bde. Gen. J. H. H. Ward (until 12/29)

Colonel E. Walker

20th Indiana Infantry Regiment

3rd Maine Infantry Regiment

4th Maine Infantry Regiment

99th Pennsylvania Infantry Regiment

2nd United States Sharpshooters

Third Brigade

Colonel Thomas W. Egan (until 12/30)

Colonel Byron R. Pierce

17th Maine Infantry Regiment

3rd Michigan Infantry Regiment

5th Michigan Infantry Regiment

Lt. Colonel Augustus Warner (until 12/30)

Colonel Thomas W. Egan

110th Pennsylvania Infantry Regiment