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.

1862
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.
December 12-15
Battle of Fredericksburg, Va.
1863
January 20-24 Burnside’s 2nd Campaign, “Mud March”
February-Aprii Duty at Falmouth
April 27-May 6 Chancellorsville Campaign
May 1-5
Battle of Chancellorsville
May 20 Mustered out