 Complete the following phrase:  Following the annexation of Austria and the Sudetenland, Germany in October 1938 urged the Danzig territorys cession to Germany. On 1 September 1939 Nazi Germany invaded Poland, initiating World War II. On 2 September 1939 Germany officially annexed the Free City. The Nazi regime murdered the Polish postmen defending the Polish Post Office: this was one of the first war crimes during the war. Other Polish soldiers 