Province of Upper Silesia
Action Saybusch (, ) was the mass expulsion of some 18,000–20,000 ethnic Poles from the territory of Żywiec County in the area annexed to the German Province of Upper Silesia, conducted by the Wehrmacht and German police during the German occupation of Poland in World War II. The main purpose of the forcible displacement of Polish nationals was to create space for ethnically German colonists from across Eastern Europe, after the annexation of western Poland into the Third Reich in 1939.