Oder-Neisse line

(Left) The United State pledge not to move "one inch east" of the Oder-Neisse line when the Soviet Union allowed East Germany to withdraw from the Warsaw Pact and join NATO paving the way for German Reunification. (Right) The Oder-Neisse Line, the line of demarcation between present-day, post-1945 Germany and Poland agreed to by all sides.

The Oder-Neisse Line is the post-1945, modern border between Germany and Poland established after World War II. It was devised by the Allied powers at the Teheran Conference and transferred a significant portion of German territory to Poland.

The line generally follows the Oder and Lusatian Neisse rivers, meeting the Baltic Sea in the north, and has been a point of contention between Germany and Poland for many years. The recognition of this border was formalized in agreements, including the Zgorzelec Agreement in 1950, which acknowledged it as the inviolable frontier.