The 166th Pennsylvania Infantry Regiment lost 6 enlisted men killed and mortally wounded and 11 enlisted men to disease during the Civil War.

1862
October 24 to December 8 Organized at York under Colonel Andrew J. Fulton, Lt. Colonel George W. Reisinger and Major Joseph A. Renaut
December 8-17 Moved to Washington, D.C., then to Newport News and Suffolk, Va.
December Duty at Suffolk attached to Foster’s Brigade, Division at Suffolk, Va., 7th Corps, Dept. of Virginia
1863
January 8-10 Expedition toward Blackwater
January 30 Deserted House
April 4 Leesville
April 11-May 4 Siege of Suffolk. Attached to to 2nd Brigade, 1st Division, 7th Corps
April 12-13 Edenton, Providence Church and Somerton Roads
April 15 and 20 Somerton Road
April 24 Edenton Road
May 12-26 Operations on Seaboard & Roanoke Railroad
May 15-16 Holland House, Carrsville
June 27-July 7 Dix’s Peninsula Campaign
July 1-7 Expedition from White House to South Anna River
July 4 South Anna Bridge
July 8 Moved to Washington, D.C.
July 28 Mustered out