Series Number Id: GSGS 3346. Sheet number: [part of sheet 66]. Training area map. Area SE of Forêt de Crécy and NE of Abbeville. "Enlarged from 1:100,000 map [which had been produced by reduction from the 1:80,000]. Detail in Training Area corrected by 3rd Field Squadron R.E." "Ordnance Survey, November, 1916." Detail and grid grey; contours brown; water blue. Training area boundary red (containing Brigade area boundaries for A, B, C and D areas). Rifle ranges, bombing grounds and bayonet courses blue. Title printed on reverse. Yvrench was the Tank Corps base., Location: Research Collections; Fonds: WW1 Trench Maps: France; Box number: PC14; envelope_number: 380.