At the end of

World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing ...

Poland Poland, officially the Republic of Poland, is a country in Central Europe. It is divided into 16 administrative provinces called voivodeships, covering an area of . Poland has a population of over 38 million and is the fifth-most populou ...

underwent major changes to the location of its international border. In 1945, after the defeat of

Nazi Germany Nazi Germany (lit. "National Socialist State"), ' (lit. "Nazi State") for short; also ' (lit. "National Socialist Germany") (officially known as the German Reich from 1933 until 1943, and the Greater German Reich from 1943 to 1945) was ...

, the

Oder–Neisse line The Oder–Neisse line (german: Oder-Neiße-Grenze, pl, granica na Odrze i Nysie Łużyckiej) is the basis of most of the international border between Germany and Poland from 1990. It runs mainly along the Oder and Lusatian Neisse rivers a ...

became its western border, resulting in gaining the

Recovered Territories The Recovered Territories or Regained Lands ( pl, Ziemie Odzyskane), also known as Western Borderlands ( pl, Kresy Zachodnie), and previously as Western and Northern Territories ( pl, Ziemie Zachodnie i Północne), Postulated Territories ( pl, Z ...

from Germany. The

Curzon Line The Curzon Line was a proposed demarcation line between the Second Polish Republic and the Soviet Union, two new states emerging after World War I. It was first proposed by The 1st Earl Curzon of Kedleston, the British Foreign Secretary, to ...

became its eastern border, resulting in the loss of the

Eastern Borderlands Eastern Borderlands ( pl, Kresy Wschodnie) or simply Borderlands ( pl, Kresy, ) was a term coined for the eastern part of the Second Polish Republic during the interwar period (1918–1939). Largely agricultural and extensively multi-ethnic, it ...

to the

Soviet Union The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, ...

Decision

These decisions were in accordance with the decisions made first by the Allies at the

Tehran Conference The Tehran Conference ( codenamed Eureka) was a strategy meeting of Joseph Stalin, Franklin Roosevelt, and Winston Churchill from 28 November to 1 December 1943, after the Anglo-Soviet invasion of Iran. It was held in the Soviet Union's embass ...

of 1943 where the Soviet Union demanded the recognition of the line proposed by

British British may refer to: Peoples, culture, and language * British people, nationals or natives of the United Kingdom, British Overseas Territories, and Crown Dependencies. ** Britishness, the British identity and common culture * British English, ...

Foreign Secretary

Lord Curzon George Nathaniel Curzon, 1st Marquess Curzon of Kedleston, (11 January 1859 – 20 March 1925), styled Lord Curzon of Kedleston between 1898 and 1911 and then Earl Curzon of Kedleston between 1911 and 1921, was a British Conservative statesman ...

in 1920. The same Soviet stance was repeated by

Joseph Stalin Joseph Vissarionovich Stalin (born Ioseb Besarionis dze Jughashvili; – 5 March 1953) was a Georgian revolutionary and Soviet political leader who led the Soviet Union from 1924 until his death in 1953. He held power as General Secretar ...

again at the

Yalta Conference The Yalta Conference (codenamed Argonaut), also known as the Crimea Conference, held 4–11 February 1945, was the World War II meeting of the heads of government of the United States, the United Kingdom, and the Soviet Union to discuss the post ...

with

Franklin D. Roosevelt Franklin Delano Roosevelt (; ; January 30, 1882April 12, 1945), often referred to by his initials FDR, was an American politician and attorney who served as the 32nd president of the United States from 1933 until his death in 1945. As the ...

and

Winston Churchill Sir Winston Leonard Spencer Churchill (30 November 187424 January 1965) was a British statesman, soldier, and writer who served as Prime Minister of the United Kingdom twice, from 1940 to 1945 during the Second World War, and again from ...

in February 1945, but much more forcefully in the face of the looming German defeat. The new borders were ratified at the

Potsdam Conference The Potsdam Conference (german: Potsdamer Konferenz) was held at Potsdam in the Soviet occupation zone from July 17 to August 2, 1945, to allow the three leading Allies to plan the postwar peace, while avoiding the mistakes of the Paris P ...

of August 1945 exactly as proposed by Stalin who already controlled the whole of

East-Central Europe East Central Europe is the region between Germanic, West Slavic, and Hungarian-speaking Europe and the East Slavic countries of Belarus, Russia, and Ukraine. Those lands are described as situated "between two": "between two worlds, between tw ...

Harry Truman Harry S. Truman (May 8, 1884December 26, 1972) was the 33rd president of the United States, serving from 1945 to 1953. A leader of the Democratic Party, he previously served as the 34th vice president from January to April 1945 under Franklin ...

remembered: Large territories of Polish Second Republic were ceded to the Soviet Union by the Moscow-backed Polish government, and today form part of Lithuania,

Belarus Belarus,, , ; alternatively and formerly known as Byelorussia (from Russian ). officially the Republic of Belarus,; rus, Республика Беларусь, Respublika Belarus. is a landlocked country in Eastern Europe. It is bordered by ...

and

Ukraine Ukraine ( uk, Україна, Ukraïna, ) is a country in Eastern Europe. It is the second-largest European country after Russia, which it borders to the east and northeast. Ukraine covers approximately . Prior to the ongoing Russian inv ...

. Poland was instead given the

Free State of Danzig The Free City of Danzig (german: Freie Stadt Danzig; pl, Wolne Miasto Gdańsk; csb, Wòlny Gard Gduńsk) was a city-state under the protection of the League of Nations between 1920 and 1939, consisting of the Baltic Sea port of Danzig (now Gda ...

and the German areas east of the rivers Oder and

Neisse The Lusatian Neisse (german: Lausitzer Neiße; pl, Nysa Łużycka; cs, Lužická Nisa; Upper Sorbian: ''Łužiska Nysa''; Lower Sorbian: ''Łužyska Nysa''), or Western Neisse, is a river in northern Central Europe.Recovered Territories The Recovered Territories or Regained Lands ( pl, Ziemie Odzyskane), also known as Western Borderlands ( pl, Kresy Zachodnie), and previously as Western and Northern Territories ( pl, Ziemie Zachodnie i Północne), Postulated Territories ( pl, Z ...

), pending a final peace conference with Germany. Since a peace conference never took place, the lands were effectively ceded by Germany.

Population transfer

The population transfer of both Polish and Germans 1945–46 included many millions of people. The Polish territory in 1919–39 covered an area of .Swedish encyclopedia '' Nordisk familjebok'' second edition, article "Polen" , fifth row a

/ref> But from 1947, Poland's territory was reduced to , so the country lost of land. This difference amounts almost to the size of the

Czech Republic The Czech Republic, or simply Czechia, is a landlocked country in Central Europe. Historically known as Bohemia, it is bordered by Austria to the south, Germany to the west, Poland to the northeast, and Slovakia to the southeast. The ...

, although Poland ended up with a much longer coastline on the

Baltic Sea The Baltic Sea is an arm of the Atlantic Ocean that is enclosed by Denmark, Estonia, Finland, Germany, Latvia, Lithuania, Poland, Russia, Sweden and the North and Central European Plain. The sea stretches from 53°N to 66°N latitude and ...

compared to its 1939 borders. In addition, the infrastructure in the

former eastern territories of Germany The former eastern territories of Germany (german: Ehemalige deutsche Ostgebiete) refer in present-day Germany to those territories east of the current eastern border of Germany i.e. Oder–Neisse line which historically had been considered Ger ...

was more developed than in the territories ceded to the Soviet Union.

Outcome

The prewar eastern Polish territories of

Kresy Eastern Borderlands ( pl, Kresy Wschodnie) or simply Borderlands ( pl, Kresy, ) was a term coined for the eastern part of the Second Polish Republic during the History of Poland (1918–1939), interwar period (1918–1939). Largely agricultural ...

, which the Red Army had overrun during the Nazi-Soviet

invasion of Poland The invasion of Poland (1 September – 6 October 1939) was a joint attack on the Republic of Poland by Nazi Germany and the Soviet Union which marked the beginning of World War II. The German invasion began on 1 September 1939, one week aft ...

in 1939 (excluding the Białystok region) were permanently ceded to the USSR by the new Polish communist government, and most of their Polish inhabitants expelled. As a result of the Potsdam Agreement to which Poland's government-in-exile was not invited, Poland lost (45%) of prewar territories in the east, including over 12 million citizens of whom 4.3 million were Polish-speakers. Today, these territories are part of sovereign

, and Lithuania.Sylwester Fertacz
"Krojenie mapy Polski: Bolesna granica" (Carving of Poland's map).
''Alfa.'' Retrieved from the

Internet Archive The Internet Archive is an American digital library with the stated mission of "universal access to all knowledge". It provides free public access to collections of digitized materials, including websites, software applications/games, music, ...

on 14 November 2011. In turn, postwar Poland was assigned considerably smaller territories to the west including the prewar Free City of Danzig and the former territory of Germany east of the

, consisting of the southern portion of East Prussia and most of

Pomerania Pomerania ( pl, Pomorze; german: Pommern; Kashubian: ''Pòmòrskô''; sv, Pommern) is a historical region on the southern shore of the Baltic Sea in Central Europe, split between Poland and Germany. The western part of Pomerania belongs to ...

Neumark The Neumark (), also known as the New March ( pl, Nowa Marchia) or as East Brandenburg (), was a region of the Margraviate of Brandenburg and its successors located east of the Oder River in territory which became part of Poland in 1945. Call ...

(East Brandenburg), and German

Silesia Silesia (, also , ) is a historical region of Central Europe that lies mostly within Poland, with small parts in the Czech Republic and Germany. Its area is approximately , and the population is estimated at around 8,000,000. Silesia is split ...

. Poland also received the town of Swinemünde (now

Świnoujście Świnoujście (; german: Swinemünde ; nds, Swienemünn; all three meaning "Świna ivermouth"; csb, Swina) is a city and seaport on the Baltic Sea and Szczecin Lagoon, located in the extreme north-west of Poland. Situated mainly on the islands o ...

) on the island of

Usedom Usedom (german: Usedom , pl, Uznam ) is a Baltic Sea island in Pomerania, divided between Germany and Poland. It is the second largest Pomeranian island after Rügen, and the most populous island in the Baltic Sea. It is north of the Szczecin ...

and the city of Stettin (now Szczecin) on the western bank of the Oder river in accordance with the Potsdam Agreement. Therefore, these transferred territories did not then form part of the

Soviet occupation zone The Soviet Occupation Zone ( or german: Ostzone, label=none, "East Zone"; , ''Sovetskaya okkupatsionnaya zona Germanii'', "Soviet Occupation Zone of Germany") was an area of Germany in Central Europe that was occupied by the Soviet Union as a ...

of Germany or the subsequent state of

East Germany East Germany, officially the German Democratic Republic (GDR; german: Deutsche Demokratische Republik, , DDR, ), was a country that existed from its creation on 7 October 1949 until its dissolution on 3 October 1990. In these years the state ...

. The German population who had stayed at or had returned to their homes were forcibly expelled before these

(official term) were repopulated with Poles from Central Poland and by Poles expelled from the eastern regions and those from central Poland. The borders of Poland resembled the borders of the German-Russian gains in World War 2, with the exception of the city Bialystok. This is called the Curzon line. The small area of

Zaolzie Trans-Olza ( pl, Zaolzie, ; cs, Záolží, ''Záolší''; german: Olsa-Gebiet; Cieszyn Silesian: ''Zaolzi''), also known as Trans-Olza Silesia ( Polish: ''Śląsk Zaolziański''), is a territory in the Czech Republic, which was disputed betwe ...

, which had been annexed by Poland in late 1938, was returned to

Czechoslovakia , rue, Чеськословеньско, , yi, טשעכאסלאוואקיי, , common_name = Czechoslovakia , life_span = 1918–19391945–1992 , p1 = Austria-Hungary , image_p1 ...

on Stalin's orders.

References

{{DEFAULTSORT:Territorial Changes Of Poland Immediately After World War II Aftermath of World War II in Germany Borders of Poland Germany–Poland relations Poland–Soviet Union relations Aftermath of World War II in Poland

Decision

Population transfer

Outcome

See also

References