He then negotiated the annexation of the Sudetenland , a German - speaking mountainous area of Czechoslovakia , in the Munich Conference .
Hitler began to put his plan in motion , annexing Austria in the Anschluss , or reunification of Austria to Germany , in 1938 .
Hitler then negotiated the annexation of the Sudetenland , a Germany - speaking mountainous area of Czechoslovakia , in the Munich Conference .
Hitler began to put his plan in motion , annexing Austria in the Anschluss , or reunification of Austria to Germany , in 1938 .