Key term for OCR GCSE History A, used in Germany 1925–1955.
A five-kilometre-wide restricted exclusion zone established by the East German government in 1952 along the inner-German border to prevent migration.
Sperrzone appears in OCR GCSE History A revision content for Non-British Depth Studies, especially Germany 1925–1955 and War and Legacy 1939–1955.
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