Series Number Id: GSGS 2736. Composite of French 1/500,000, sheets 2 and 5. Strategic map, August 1914. "Printed at the War Office, Aug. 1914". Detail and railways black; water blue; principal roads red; fortresses red. Fortresses shown are Lille, Maubeuge, La Fere, Laon, Reims, and Paris., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC27; envelope_number: 806.