Drang nach Osten
From 1933, the Third Reich under Hitler laid claim to the Rhineland, the Sudetenland, unification ("Anschluss") with Austria in 1938 and the ocuupation whole of the Czech lands the following year. After war broke out, Hitler and Stalin divided Poland between Germany and the Soviet Union. In a "Drang nach Osten" aimed at achieving "Lebensraum" for the German people, Germany invaded the Soviet Union in 1941.