Prussian deportations
The Prussian deportations, also known as the Prussian expulsions of Poles (Polish: rugi pruskie; German: Polenausweisungen), were the mass expulsions of Poles from Prussia between 1885 and 1890. More than 30,000 Poles who had immigrated to Prussia from the Polish regions of the Russian Empire and Austria and did not obtain a German citizenship, were deported back to their country of origin.