The Germany–Poland border (German: Grenze zwischen Deutschland und Polen, Polish: Granica polsko-niemiecka), the state border between Poland and Germany, is currently the Oder–Neisse line. It has a total length of 467 km (290 mi) and has been in place since 1945. It stretches from the Baltic Sea in the north to the Czech Republic in the south.
The Germany–Poland border traces its origins to the beginnings of the Polish state, with the Oder (Odra) and Lusatian Neisse (Nysa) rivers (the Oder–Neisse line) being one of the earliest natural boundaries between Germany and the Slavic tribes. Over several centuries, it has moved eastwards, stabilized in the 14th century, and disappeared in the late 18th century with the partitions of Poland, in which Poland's neighbors, including the Kingdom of Prussia, annexed all of its territory. In 1871 Prussia became part of the German Empire.
After Poland regained independence following World War I and the 123 years of partitions, a long German-Polish border was settled on, 1,912 km (1,188 mi) long (including a 607 km (377 mi) border with East Prussia). The border was partially shaped by the Treaty of Versailles and partially by plebiscites (East Prussian plebiscite and the Silesian plebiscite, the former also affected by the Silesian Uprisings). The shape of that border roughly resembled that of pre-partition Poland.
After World War II, the border was drawn from Świnoujście (Swinemünde) in the north at the Baltic Sea southward to the Czech Republic (then part of Czechoslovakia) border with Poland and Germany near Zittau. It follows the Oder–Neisse line of the Oder (Odra) and Neisse (Nysa) rivers through most of their course.[dubious ] This was agreed upon by the main Allies of World War II – the Soviet Union, the United States, and the United Kingdom, at the Soviets' insistence, and, without any significant consultations with Poland (or Germany), at the Yalta Conference and Potsdam Conference. Soviet foreign minister Vyacheslav Molotov, replied to Mikołajczyk's question about the western border of Poland that "it should be based on the Oder River". At the summit in Yalta, the leaders of the powers decided to hand over to Poland part of East Prussia with Olsztyn and Elbląg, Pomerania with Gdańsk and Szczecin, Lower and Upper Silesia with Opole, Wrocław and Gliwice, and the Lubusz land. On July 24, the only time in history, the communist Bierut and the oppositionist Stanisław Mikołajczyk spoke with one voice, fighting for the Oder and Eastern Neisse line. Churchill insisted on Eastern Neisse, which meant that Wałbrzych with its region and Jelenia Góra would remain German. Just before the final protocol was signed, Soviet diplomats made one more amendment according to which the border was to run "west of Świnoujście". Like a trifle, but thanks to this Szczecin got free access to the Baltic Sea.
This border was a compensation to Poland for territories lost to the Soviet Union as a consequence of the Molotov–Ribbentrop Pact, and resulted in significant westward transfers of German population from the Recovered Territories, matching the Polish population transfers from the Kresy territories. It roughly matched the centuries-old, historical border between the Medieval Polish and German states. It divided several river cities into two parts – Görlitz/Zgorzelec, Guben/Gubin, Frankfurt (Oder)/Słubice, Bad Muskau/Łęknica.
An urgent issue in the west was the delineation of a border section from Świnoujście to Gryfino in the terrain. Until autumn 1945, these areas, with the exception of Szczecin, were not yet included in the Polish administration. This section of the border was delineated in September and October 1945 by the Polish-Soviet mixed commission. In accordance with the signed agreement, the Polish administration took over them on October 4, 1945. With the detailed demarcation of the western border, it turned out that in many places it was absurd. The statement of the Potsdam conference that the border should run "directly" west of Świnoujście was put into action so literally that even the water intake for the city of Świnoujście was left abroad. This situation meant that over the years corrections were made to the previously set border route. It was already established in September 1945 that Poland would depart from the German side of Rieth and Altwarp in exchange for Stolec, Buk, Bobolin, Barnisław, Rosówek, Pargowo and the Stobno-Kołbaskowo road. In 1949, however, the border was adjusted at the height of the intersection and the Links-Neu Lienken-Buk road. It was agreed that the entire intersection in Nowe Linky would go to the side of the German Democratic Republic, in exchange for a narrow strip of land lying directly on the west side of the road from Nowe Linki to Buk. In January 1951, an act was drawn up to delineate the border between the Polish People's Republic and the German Democratic Republic, confirming the Polish administration of the islands between the Western Oder and Regalica (Międzyodrze) south of Gryfino. In November 1950, the government of the German Democratic Republic agreed to the transfer of a water intake to Poland, located at Lake Wolgastsee. In June of the following year, an area of 76.5 ha (together with a water treatment plant) was incorporated into Poland, creating a characteristic promontory protruding into the German area. In return, Germany was granted a similar area between the water intake and the Pomeranian Bay.
On June 6, 1950, a declaration was signed between the government of the Polish People's Republic and the German Democratic Republic on the demarcation of the existing Polish-German border on the Oder–Neisse line. After the initial agreement, both countries concluded the Treaty of Zgorzelec. The border was recognized by West Germany in 1970 in the Treaty of Warsaw, and by reunified Germany, in 1990 in the German–Polish Border Treaty of 1990. It was subject to minor corrections (land swaps) in 1951. The borders were partially open from 1971 to 1980, when Poles and East Germans could cross it without a passport or a visa; it was however closed again after few years, due to economic pressure on the East German economy from Polish shoppers and the desire of the East German government to diminish the influence of the Polish Solidarity movement on East Germany.
Following the fall of communism in Poland and Germany, and the German reunification, the border became part of the eastern border of the European Economic Community, then that of the European Union. For a period, it was "the most heavily policed border in Europe". After Poland joined the European Union in 2004, the border controls were relaxed in agreement with the Schengen Agreement to eliminate passport controls by 2007. The modern borderlands of Poland and Germany are inhabited by about one million of those countries' citizens within the counties on each side.
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