For years, Douglas Haig has been considered perhaps the most controversial military leader in British history. Today his career is at the center of a swirling historiographical debate concerning the nature of the First World War. The traditional school contends that Haig, like the majority of generals from both sides, were overmatched, hidebound relics of a bygone military age who could not come to grips with modern war. They allegedly sent their soldiers over the top in waves, with a criminal disregard for the mounting cost in lives. A new revisionist school contends that many Great War leaders, including Haig, were central to a phenomenal period of military innovation that laid the foundations for modern war. This so-called learning curve led from the killing fields of the Somme to the protoblitzkrieg tactics of the 100 Days Battles.