The 203rd Pennsylvania Infantry Regiment lost 4 officers and 70 enlisted men killed or mortally wounded and 72 enlisted men to disease during the Civil War.

1864
September 10 Organized at Philadelphia
September 22-27 Moved to Petersburg, Va. Attached to 2nd Brigade, 2nd Division, 10th Army Corps, Army of the James
September 27 Detached from Brigade and provost at Deep Bottom, Va., and picket at Malvern Hill
October 5 Rejoined Brigade
October-November Siege operations against Richmond
October 27-28 Battle of Fair Oaks
December 7-27 Expedition to Fort Fisher, N. C. Attached to 2nd Brigade, 2nd Division, 24th Army Corps.
1865
January 3-15 2nd Expedition to Fort Fisher, N. C. Attached to 2nd Brigade, 2nd Division, Terry’s Provisional Corps, Dept. North Carolina
January 15 Assault and capture of Fort Fisher
February 11-22 Advance on Wilmington
February 11 Sugar Loaf Battery
February 19 Fort Anderson
February 22 Capture of Wilmington
March 6-21 Advance on Goldsboro attached to 2nd Brigade, 2nd Division, 10th Army Corps, Dept. of North Carolina
March 21-April 10 Guard railroad at Faison’s Depot
April 10-14 Advance on Raleigh
April 14 Occupation of Raleigh
April 26 Bennett’s House. Surrender of Johnston and his army.
May-June Duty at Raleigh
June 22 Mustered out