 German planners also envisioned forced expulsion and resettlement of the Polish and Jewish population which would be replaced by German colonists.The proposed area of the Border Strip comprised up to 30,000 km² (approximately the size of Belgium), and up to 3 million people were to be ethnically cleansed to make room for German settlers.The strip was also intended to separate the Polish inhabitants of Prussian-held Greater Poland from those in Congress Poland.