Herbert Wagner started engine developments at Junkers in 1936, placing Adolf Müller in overall charge of the project. In 1938 Junkers purchased Junkers Motoren (Jumo), formerly a separate company. In October 1939, under pressure from the RLM, Junkers moved all their engine work to Jumo's Dessau factories from their main plants at Magdeburg. Müller would have ended up in a subordinate role after the move, but decided to leave instead. He and about half of the original Junkers team were scooped up by Ernst Heinkel and moved to his primary "Heinkel-Nord" campus in Rostock-Schmarl, where Hans von Ohain was working on the Heinkel HeS 3 engine.