The regiment was attached to 1st Brigade, 1st Division, 5th Corps, Army of the Potomac.
The 198th Pennsylvania Infantry mustered out of service on June 4, 1865.
Boydton Plank Road, Hatcher's Run, October 27–28.
Warren's Raid to Weldon Railroad December 7–12.
Dabney's Mills, Hatcher's Run, February 5–7, 1865.