of Poland. This line left the Oder river north of Gartz (Oder) and included the Stettin and Swinemünde area () into the Polish state. The remaining German population was expelled and the area was resettled with Poles. Western Pomerania west of the Oder-Neisse line was merged with Mecklenburg to constitute the state of Mecklenburg-Vorpommern in the Soviet occupation zone of Germany, that in 1949 became the German Democratic Republic (GDR). was soon dropped from the federal state's name, and after the GDR states were abolished, the coastal Western Pomeranian Landkreis districts became part of Bezirk Rostock whereas the mainland Landkreis districts became part of Bezirk Neubrandenburg. In 1990, after the GDR communist system was overthrown, the state of Mecklenburg-Vorpommern was recreated, with Vorpommern being a non-administrative region. The districts Vorpommern-Rügen and Vorpommern-Greifswald constitute most of the German part of former Pomerania, but these districts also contain some former Mecklenburgian territory, and a small part of former Pomerania is now part of Brandenburg. Due to this, the old Pomeranian border disappeared from the map and today is only prevailed by the border of the Pomeranian Evangelical Church. The part of the province of Pomerania which had become Polish was re-organized as Szczecin Voivodeship after the war, from which the eastern part was split off as Koszalin Voivodeship in 1950. Słupsk Voivodeship was split off from this voivodeship in 1975, there were also territorial exchanges with neighboring voivodeships. Since 1999, the area of the former province of Pomerania is included in the West Pomeranian Voivodeship (Zachodniopomorskie, bulk) and Pomeranian Voivodeship (western part around Słupsk, formerly Stolp). Administrative subdivisions Köslin government region (Farther Pomerania) The Köslin government region () was the administrative name for the region of Farther Pomerania () along with the smaller region of Lauenburg and Bütow Land (easternmost part). These parts of Pomerania were integrated into the Brandenburg-Prussian Province of Pomerania (1653–1815) already after the Thirty Years' War. During the war, the noble House of Pomerania (Griffins), ruling the Duchy of Pomerania since the 1120s, became extinct in the male line with the death of Bogislaw XIV in 1637. Throughout the existence of the Griffin Duchy, Brandenburg had claimed overlordship and was asserted of Pomerania inheritance in numerous treaties. Yet, Sweden had been one of the most important players in the war and as such, she was awarded some of her territorial gains in Pomerania after the war by the