The 126th Pennsylvania Volunteer Infantry Regiment lost 1 officer and 30 enlisted men killed or mortally wounded and 34 enlisted men to disease during the Civil War.
|August||Organized at Harrisburg under Colonel James G. Elder|
|August 15||Left State for Washington, D.C. and duty there|
|September 12||Moved to Sharpsburg, Md., and attached to 1st Brigade, 3rd Division, 5th Army Corps, Army of the Potomac.|
|September-October||Duty at Sharpsburg|
|October 16-17||Reconnaissance from Sharpsburg to Smithfield, W. Va.|
|October 30-November 19||Movement to Falmouth, Va.|
Battle of Fredericksburg, Va.
|January 20-24||Burnside’s 2nd Campaign, “Mud March”|
|February-Aprii||Duty at Falmouth|
|April 27-May 6||Chancellorsville Campaign|
|May 20||Mustered out|