This is the first part of a planned four-volume series focusing on a hitherto largely neglected aspect of the Great War on the Western Front - the war underground. The subject has fascinated visitors to the battlefields from the very beginning of battlefield pilgrimages in the years immediately after the Armistice. This volume looks mainly at the central Artois, the environs of the whole line of the Vimy Ridge to the River Scarpe and Arras. The narrative draws on French and German archival material and personal descriptions. The text is illustrated with numerous diagrams and maps, in...