This research project looks at two intertwined processes in the history of North American and German geography from the early 20th century to the 1970s. First, the shifting hegemonic relations between “theory-importer” United States and “theory-exporter” German human geography, in which a formerly peripheral US geography triumphed over its German counterpart and became hegemonic after WWII; second, this shift was connected to the post-WWII quantitative revolution in US and Canadian geography during the 1950s and 1970s, in which the discipline became a mathematical and rigorous Cold War spatial science. This project follows a transnational historical perspective in the historical geographies of scientific knowledge to look at how geographical knowledge circulated and interacted between North America and Germany. It does so by analyzing the influence and circulation of German geographical knowledge and location theories, most notably central place theory in urban and regional planning, which became a paradigmatic theory of Cold War geography internationally, and later re-influenced German geography from the late 1960s from the US. The research project is based on archival research and career path interviews with scholars connected to the quantitative revolution.