Answer :
The militarization of the Rhineland, the annexation of Austria, and the forced annexation of the Sudetenland of Czechoslovakia were all aggressive moves the Third Reich made that were appeased by the other world powers.
What was the main cause of such Aggressive moves?
Prior to World War One, for many centuries , the Sudetenland was called as the German Bohemia, was a part of Bohemia, an area inhabited mostly by Czechs, which was located in Austria, which was later called as the Austrian Empire, and thenceforth, called as the Austro-Hungarian Empire. After Austria-Hungary's dissolution, the area was transferred to the new nation of Czechoslovakia.
In the 1930s, Germany expanded its territory. It annexed Austria in the year 1938, then the Sudetenland in the year 1939, followed by the rest of Czechoslovakia soon after such moves. The invasion of Poland marked the beginning of the Second World War.
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