Basic Details Surname O'Brien Forenames Joseph Gender Male Information stated on memorial War First World War (1914-1918) Served or died Died Notes Hornshaw and Fowler (see References) provide the extra details. He is also listed on IWM 2689. Primary Service Our References Service (Primary - Our reference) British Army Unit (Primary - Our reference) The Prince of Wales's Own (West Yorkshire Regiment) Rank / Title (Primary - Our reference) Private Death and Burial details Country of death France Country of burial France Town of burial Vermelles Cemetery British Military Cemetery Year of death 1916 Month of death September Day of death 11 Age at death 43 Manner of death as stated Not Stated on Memorial Manner of death reference Killed in Action Personal Details Occupation Not Stated on Memorial