Lyn Macdonald's 1915: The Death of Innocence is a uniquely compelling blend of military history and poignant memories of the fighters who survived the ordeal.By Christmas 1915, the wild wave of enthusiasm that had sent men flocking to join up a few months earlier had begun to tail off, and though the Regulars of the original Expeditionary Force had suffered 90 percent casualties, most, particularly the soldiers themselves, still believed that 1915 would se...