Oder–Neisse line
The Oder–Neisse line (, ) is the basis of most of the international border between Germany and Poland. It runs mainly along the Oder and Lusatian Neisse rivers and meets the Baltic Sea in the north, just west of the ports of Szczecin and Świnoujście (Former German names: Stettin, Swinemünde).

All prewar German territories east of the line and within the 1937 German boundaries – comprising nearly one quarter (23.8 percent) of the (pre-Nazi) Weimar Republic – were annexed under border changes promulgated at the postwar Potsdam Conference, with most becoming part of Poland. The small remainder, consisting of northern East Prussia with the German city of Königsberg (now renamed Kaliningrad), was allocated to the Soviet Union as the Kaliningrad Oblast of the Russian SFSR (today Russia). A part of the German population in these territories – estimated at approximately 12 million as of autumn 1944 – had fled the advance of the Red Army.

The Oder–Neisse line marked the border between East Germany and Poland from 1950 to 1990. Communist East Germany agreed to the border with Communist Poland in 1950, while West Germany, after a period of refusal, adhered to the border (with reservations) in 1970.

After the revolutions of 1989, the newly reunified Germany and the newly democratic Republic of Poland definitively accepted the line as their border in the 1990 German–Polish Border Treaty.
Q15214996
the international border
Concept
Q183
Germany
LOC
Q36
Poland
LOC
Q552
Oder
LOC
Q5602
Lusatian Neisse
LOC
Q545
Baltic Sea
LOC
Q393
Szczecin
LOC
Q41599
Świnoujście
LOC
Q700842
prewar German territories
Concept
Q41304
Weimar Republic
Concept
Q151187
Potsdam Conference
MEDIA
Q36
Poland
LOC
Q103801
East Prussia
LOC
Q4120832
Königsberg
LOC
Q1829
Kaliningrad
LOC
Q15180
Soviet Union
LOC
Q1749
Kaliningrad Oblast
LOC
Q2184
Russian SFSR
LOC
Q159
Russia
LOC
Q16957
East Germany
LOC
Q211274
Communist Poland
LOC
Q713750
West Germany
LOC
Q382861
revolutions of 1989
TIME
Q56039
newly reunified
Concept
Q650979
German–Polish Border Treaty
LOC
Q160928
Oder–Neisse line
Concept
Q160928
Oder–Neisse line
Concept
1937-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1937
DATE
1944-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1944
DATE
1950-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1950
DATE
1990-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1990
DATE
1950-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1950
DATE
1970-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1970
DATE
1989-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1989
DATE
1990-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1990
DATE
+23.8^^http://www.w3.org/2001/XMLSchema#decimal
23.8
NUMBER
+12^^http://www.w3.org/2001/XMLSchema#decimal
12
NUMBER
country
country
country
country
country
diplomatic relation
diplomatic relation
mouth of the watercourse
country
country
located in present-day administrative territorial entity
country