1923 Mapa de Alemania después de la Primera Guerra Mundial con áreas en disputa: Sarre y Alta Silesia en rev. Francia

The disputed regions of he Saar & Upper Silesia. Upper Silesia was an industrial area on the border between Germany and Poland. Poland and Germany disputed the territory in 1921. Upper Silesia was awarded to Poland in the Treaty of Versailles, but most of the region's population was German.

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