Beautiful postcard issued by Hitler's photographer Heinrich Hoffman, celebrating annexation of Sudetenland into the German Third Reich. The beginning of the end of Czechoslovakia. It shows outline of Greater Germany (Großdeutschland) with Austria and Sudetenland included. The caption says "Wir Danken Unserm Führer" which means "We are thanking our Leader". 
A year earlier Austtria was annexed and a similar commemorative postcard was issued by Hoffmann. See it here.