The 136th Pennsylvania Infantry was organized at Harrisburg, Pennsylvania, and mustered in for a nine-month enlistment beginning August 22, 1862, under the command of Colonel Thomas McKee Bayne.
The regiment was attached to 2nd Brigade, 2nd Division, I Corps, Army of the Potomac.
Moved to Washington, D.C., August 29, and duty there until September 29.
Burnside's 2nd Campaign, "Mud March," January 20–24, 1863.
Operations at Pollock's Mill Creek April 29-May 2.