First Army area : [Lille, Lens, Douai, September 1917]
Series Number Id: UNKNOWN. Sheet number: part of sheet 51. Edition number: 3. "Distribution of German Forces, showing latest identificatons, 18-9-17" in red overprint. "1st Field Survey Co., R.E. 2521" in lower margin; "1st Field Survey Company, R.E. 2692" in red overprint. "Printed by No. 6 Advanced Section, A.P.& S.S." Blue base map. Shows whole of First Army Front from north of Armentières to north of Arras, with (in red) Front Line and German Groups (Corps), Divisions and Regiments, with sources of intelligence. Marginal information in red gives details of German Organisation and Reserves. Used by Major J.C. Thomson MC, OC 20th Siege Battery RGA (8-inch hows)., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC19; envelope_number: 615.