Upper Silesia Plebiscite Decides German-Polish Border, March 20, 1921

The Upper Silesia plebiscite, mandated by the Versailles Treaty to determine a section of the border between Weimar Germany and Poland, is held.

The Upper Silesia plebiscite, mandated by the Versailles Treaty to determine a section of the border between Weimar Germany and Poland, is held.

Date: March 20, 1921

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