The First World War was marked by an exceptional expansion in the use and production of military cartography. But World War II took things even further, employing maps, charts, reconnaissance, and the systematic recording and processing of geographical and topographical information on an unprecedented scale. As Jeremy Black—one of the world's leading military and cartographic historians—convincingly shows in this lavish full-color book, it is impossible to understand the events and outcomes of the Second World War without deep reference to mapping at all levels. In World War II, maps themselves became the weapons.