1 - Polish Voivodeship Silesia before 1939 within borders of Germany before 1920
2 - Polish Voivodeship Silesia before 1939 within borders of Austria Germany before 1920 (Cieszyn Silesia)
3 - so called Zaolzie - part of Cieszyn Silesia annexed from Poland in 1938, after 1920 within Czechoslovakia (in German Olsa-Gebiet, but in WW2 the term would be extended for the whole Cieszyn County)
4 - new "Ostoberschlesien", before 1939 in Voivodeships Kielce and Kraków
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