Basic Details Surname Duff Forenames Wiliam L Gender Male Information stated on memorial War American Civil War (1861-1865) Served or died Died Notes Lt. Col.2nd Illinois Regt. of Artillery Primary Service As stated on memorial Service (Primary - Stated) United States Federal Army Unit (Primary - Stated) 2nd Illinois Regt, of Artillery Sub-unit (Primary - Stated) Not stated on memorial Rank / Title (Primary - Stated) Lt. Col. Our References Rank / Title (Primary - Our reference) Lieutenant Colonel