Basic Details Surname Cookson Forenames Mostyn Eden Gender Male Information stated on memorial War First World War (1914-1918) Served or died Died Notes Commemorated on La Ferte-sous-Jouarre Memorial, France Primary Service As stated on memorial Service (Primary - Stated) Army Unit (Primary - Stated) Royal Sussex Regiment Sub-unit (Primary - Stated) 2nd Batallion Rank / Title (Primary - Stated) Major Our References Service (Primary - Our reference) British Army Unit (Primary - Our reference) The Royal Sussex Regiment Rank / Title (Primary - Our reference) Major Death and Burial details Year of death 1914 Month of death September Day of death 14