This chapter examines one part of that nexus: the role of geographers and cartographers in shaping, producing and disseminating national intelligence. It focuses on one arm of US intelligence during World War II in which geographers played a significant role: the office of the Coordinator of Intelligence (COI) that in 1942 was re-named the Office of Strategic Services (OSS). The chapter examines the involvement of American geographers in the provision of US intelligence during and immediately following World War Two. It is concerned with documenting geographical practices of intelligence both in wartime and in the post-war reconstructions in Europe and the Far East that followed. The chapter shows how the wartime experience of the OSS shaped not only the personal biographies of the men involved, but also how it shifted geography onto a more scientific footing although sometimes at the cost of eradicating its political commitments.