"Canadian artillerymen building a gun emplacement in Souchez Valley. Sept. 1917" is the official caption. NOTE: In the SHCMA photo register it states that the photo is (wrongly) o.3807. This photo also shows a train but does not match the description. The number should be o.3867. SHCMA photo register description: Behind the WW I lines. Canadian soldiers working at what may be an ammunition dump. Camouflage painted small work narrow-gauge train on left. The Souchez sector had been under German occupation since the beginning of WW I. The Cabaret Rouge café in the village left its name to this sector and to a communication trench. The Germans captured the sector in August-September 1914. They controlled the area from the top of Vimy Ridge and Lorette Ridge, respectively located to the east and west of the village of Souchez. French troops captured Lorette Ridge in 1915, and the Canadians Vimy Ridge in April 1917 at the price of a enormous number of casualties.Most of the 3500 Canadian soldiers, who died between 9 and 12 April 1917 during the Battle of Vimy Ridge, were buried in the Cabaret Rouge Cemetrey.