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

Third Division

Brigadier General Abner Doubleday

First Brigade

Brigadier General Thomas A. Rowley

121st Pensylvania Infantry Regiment

Colonel Chapman Biddle

135th Pensylvania Infantry Regiment

Colonel James R. Porter

mustered out 5/24

142nd Pensylvania Infantry Regiment

Colonel Robert P. Cummins

151st Pensylvania Infantry Regiment

Colonel Harrison Allen

Second Brigade

Brigadier General Roy Stone

143rd Pensylvania Infantry Regiment

Colonel Edmund L. Dana

149th Pensylvania Infantry Regiment

Lt. Colonel Walton Dwight

150th Pensylvania Infantry Regiment

Colonel Langhorne Wister

Artillery

Major Ezra W. Matthews

Battery B, 1st Pennsylvania Artillery

Captain James H. Cooper

to 1st Corps Artillery Bde.

Battery F, 1st Pennsylvania Artillery

Lieutenant R. Bruce Ricketts

to Artillery Reserve, 3rd Volunteer Bde.

Battery G, 1st Pennsylvania Artillery

Captain Frank P. Amsden

to Artillery Reserve, 3rd Volunteer Bde.