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Polish Corridor

strip of Poland between Germany & East Prussia, giving Poland an outlet to the Baltic Sea (1919-39): c. 120 mi (193 km) long; 20-70 mi (32-113 km) wide

See Polish Corridor in American Heritage Dictionary 4

A strip of land between the German territories of Pomerania and East Prussia awarded to Poland by the Treaty of Versailles (1919) to afford access to the Baltic Sea. Friction over control of the area was an immediate cause of the German invasion of Poland (September 1, 1939) that marked the beginning of World War II.

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