The relationship between "national" geographical schools and an increasingly globalized geographical theory-building under the logics of Anglophone hegemony has generated critical debate within geography. This paper aims to contribute to current discussions on the development of differential, language-based "schools of thought" in geography and how these are mobilized and de- and recontextualized when they travel beyond their origins. However, it does not focus on the period of Anglophone hegemony but intends to shed a new, historically informed light on the politics of geographical knowledge production. Against this backdrop, we study why, how and with what consequences German geographical knowledge traveled to Argentina in the 1940s - the end of the "German hegemony" - following the employment by the National University of Tucumán (UNT) of the four German geography professors Wilhelm Rohmeder, Gustav Fochler-Hauke, Fritz Machatschek and Willi Czajka, all of whom had been institutionally and ideologically entwined with National Socialism. Firstly, we show that the epistemic differences between "national" schools of geographical thought - skillfully juggled by the geographers we analyze here - can provide an opportunity for the successful de- and recontextualization of theory. Secondly, we argue that boundary spanning and the traveling of theory beyond their geographical origins - largely (implicitly) viewed as progressive - should always be put in context(s) and assessed more cautiously from a normative point of view.