Basic Details Surname Mountain Forenames Sidney William Gender Male Information stated on memorial War First World War (1914-1918) Served or died Died Service number 51580 Primary Service As stated on memorial Unit (Primary - Stated) Royal Engineers Sub-unit (Primary - Stated) 99th Field Company Rank / Title (Primary - Stated) Sapper Our References Service (Primary - Our reference) British Army Unit (Primary - Our reference) Royal Engineers Rank / Title (Primary - Our reference) Sapper Death and Burial details Country of burial Greece Town of burial Thessaloniki Cemetery Mikra British Cemetery Year of death 1919 Month of death January Day of death 7 Manner of death as stated Died Manner of death reference Other