During the war there were few more interesting places in Washington—and none, perhaps, more difficult to obtain access to—than the map-room of the Military Intelligence Division. On its walls were displayed every conceivable sort of map and diagrams depicting the movements of the armies on the various fronts. Not only were there large-scale maps of the European fronts on which our troops were fighting, but there were likewise maps on which rows of tiny colored flags indicated the positions of the opposing forces in Russia, Siberia, Macedonia, Mesopotamia, Palestine, China, German East Africa, German Southwest Africa, and the Cameroons. These maps recorded, not only from day to day, but frequently from hour to hour, the advance or retreat of the lines on the various fronts, besides representing in graphic form the location of the enemy forces and indicating any economic conditions which were of particular interest at the moment. Thanks to the completeness of our information and the speed with which it was transmitted from the battle-fronts to Washington, the Director of Military Intelligence could sit in his map-room and follow the progress of a great battle on the Western Front as readily as the crowd in front of a newspaper office can follow a battle on a baseball diamond by means of the automatic score-board. In addition to the unceasing care and study necessary for keeping the maps of the various fronts up to the minute, and for anticipating events so that maps which might be needed in the near future would be ready, as, for example, when we first contemplated sending an expedition to Italy or when we learned that the British were preparing to invade Palestine, the staff of the map-room had many other duties. It verified every name which occurred in the cables which were constantly being received from every corner of the globe (and if you have ever seen what a cable operator can do to geographical names you will appreciate how far from a sinecure this task was); it answered periodic letters from the Custodian of Alien Property requesting information as to the situation and possession of various enemy-owned estates, and it dealt with demands for every conceivable sort of information from every conceivable quarter. For example, the National Geographic Society asked for the boundaries of the Ukraine, which the society’s geographic experts had been unable to determine themselves; the Naval Intelligence Division inquired about maps of northern France and where it could obtain them; the Shipping Board wanted information regarding French coastwise services. When the Siberian Expeditionary Force was being organized it became imperative that its commander should have an English map of the Trans-Siberian Railway. No such map had ever been made, but by a stupendous effort the officers of the subsection succeeded in translating three sections of the available Russian map. The other sections were translated by the War College, and