[The Department for Tropical Medicine of the Robert Koch-Institute during the "Third Reich": research areas, actors, and contributions to Nazi expansionist politics].

Using the methods of institutional history, this article examines the Department for Tropical Medicine of the Robert Koch-Institute for Infectious Diseases in Berlin. The Heads of Department were deeply involved in the crimes against humanity during National Socialism. The relationship between science and politics is analysed with regard to the so-called self-mobilization of scientists, especially during Word War II. Particularly Gerhard Rose accumulated various posts in science, the military and in state organizations during National Socialism, extending in this way his influence on research in tropical medicine.