Third Division, Fifth Army Corps, Army of the Potomac

Brigadier General Andrew A. Humphreys (marker)
First Brigade	Brigadier General Erastus B. Tyler
91st Pennsylvania Infantry Regiment	Colonel Edgar M. Gregory
126th Pennsylvania Infantry Regiment	Colonel. James G. Elder
129th Pennsylvania Infantry Regiment	Colonel Jacob G. Frick
134th Pennsylvania Infantry Regiment	Colonel Matthew S.Quay
Second Brigade	Colonel Peter H. Allabach
123rd Pennsylvania Infantry Regiment	Colonel John B.Clark
131st Pennsylvania Infantry Regiment	Lieutenant Colonel William B. Shaut
133rd Pennsylvania Infantry Regiment	Colonel Franklin B. Speakman
155th Pennsylvania Infantry Regiment	Colonel Edward J. Allen
Artillery	Colonel T. B. W. Stockton
Battery C, 1st New York Light Artillery	Captain Almont Barnes
Battery L, 1st Ohio Light Artillery	Captain Lucius N. Robinson
(reached the field of Antietam Sept.18th)
Key to notes: (k) = killed, (w) = wounded, (mw) = mortally wounded, (c) = captured (monument) links to a monument page and (marker) links to a War Department marker page on this site Links on regiments, batteries, companies, and individuals go to unit histories or biographies on www.civilwarintheeast.com

First Brigade