After World War II the Potsdam Conference assigned the majority of the Neumark to Polish administration, and since 1945 has remained part of Poland. Polish settlers largely replaced the expelled German population. Most of the Polish territory became part of the Lubusz Voivodeship, while the northern towns Choszczno (Arnswalde), Myślibórz (Soldin), and Chojna (Königsberg in der Neumark) belong to the West Pomeranian Voivodeship. Some territory near Cottbus, which was administratively part of the Government Region of Frankfurt (coterminous with the Neumark) after the 1815 Congress of Vienna, became part of East Germany in the 1940s, becoming part of Germany after reunification in 1990.