Germany laid claim on Sudetenland, which was part of German-speaking of Czechoslovakia.
The events in Europe in the 1930s were Germany laid claim to Sudetenland as it was a German-speaking part of Czechoslovakia.
Under Hitler, the Germans went after land that they claimed should belong to Germany due to it being occupied by German speakers.
the missing information is as follows:
Germany laid claim on (Sudetenland/The Polish Corridor/Norway) which was a part of German-speaking (Czechoslovakia/Belgium/Denmark)
Therefore, Germany laid claim on Sudetenland, which was part of German-speaking of Czechoslovakia.
Learn more about Europe in the 1930s:
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