"1870 woke us out of that sleep, for it gave us an enemy formed by the teaching of history—by the study of concrete facts. It was in such a fashion that Scharnhorst, Willisen and Clausewitz had, from the beginning of the nineteenth century, formed the Command of the Prussian Army. In order to know and understand war they had not confined themselves to examining the tool which is used in warfare, and taking it to pieces in its component material parts without taking man—who uses it—into account. In the Book of History, carefully analysed, they had found the living Army, troops in movement and action with their human needs, passions, weaknesses, self-denials, capacities of all sorts: "Far from being an exact science, war is a dreadful and impassioned drama.""