The Arras sector of the Western Front in the First World War (WWI) was held partly by the British and Dominions 1st Army from September 1915, and almost wholly by the 1st and 3rd Armies from March 1916. No less than in the Ypres sector to the north and the Somme sector to the south, the struggles of the French and then British troops in this sector were pivotal to the outcome of the War. The sector included countryside in the south, but in the north...