Basic Details Surname Hack Forenames W O Gender Male Information stated on memorial War First World War (1914-1918) Served or died Died Primary Service As stated on memorial Service (Primary - Stated) Army (British) Unit (Primary - Stated) Royal Engineers Rank / Title (Primary - Stated) Staff Sergeant Major Our References Service (Primary - Our reference) British Army Unit (Primary - Our reference) Royal Engineers Rank / Title (Primary - Our reference) Warrant Officer Class II (Sergeant Major) Death and Burial details Manner of death as stated Unknown