Battle of Doiran between the Allies and the Bulgarians. Map produced by the Survey Company Royal Engineers, British Salonika Force. Trenches corrected to 12-3-17 from photos by [British] Royal Flying Corps. Edition 2A. Stamped "Confidential." Several spot heights are pencilled on the map. Heavy linen backing; note regarding sources used to compile map; note regarding accuracy of streams; grid with 1000 metre squares; contours and water features in colour. Location: Research Collections WWI Trench Map Fonds, Box 8, Envelope 255.