Before revision: Linguistic map of the eastern provinces of Prussia (1910 census) After a brief period of thaw in the years 1841–49, Bismarck intensified Germanisation again during 1849–70 as part of his Kulturkampf against Catholicism in general, but in particular against Polish Catholics.
After revision: Nationality map of the eastern provinces of Prussia (1910 census) After a brief period of thaw in the years 1841–49, Bismarck intensified Germanisation again during 1849–70 as part of his Kulturkampf against Catholicism in general, but in particular against Polish Catholics.