A strip of land that split a nation and sparked a world war
In short: The Polish Corridor was a geopolitical anomaly: a narrow strip of land that gave a new nation sea access while physically severing a province from the rest of Germany. It became the primary pretext for World War II, illustrating how geography can be weaponized into a catalyst for global conflict.
Following World War I, the Treaty of Versailles (1919) transferred West Prussia and much of the Posen region from Germany to the newly reconstituted Poland. This territory, ranging from 20 to 70 miles wide, was essential for Poland to secure its only access to the Baltic Sea. While the land was historically Polish and inhabited by a Polish majority, the arrangement caused intense German resentment because it separated the province of East Prussia from the main body of the German Reich.
The term 'corridor' itself is a point of historical contention. While some historians suggest it was a product of 1920s German nationalist propaganda, Polish diplomats—including Foreign Minister Józef Beck—viewed the word as an artificial and offensive label. Beck argued the land was an integral part of Poland for centuries and should be referred to by its administrative name, the Pomeranian Voivodeship. The League of Nations governed Danzig as a 'free city' to manage regional intricacies, whereas Gdynia was built by Poland as a different maritime hub.
The corridor's strategic importance eventually led to its role as a flashpoint. During March 1939, Adolf Hitler requested that Danzig be handed over and that German roads be constructed outside Polish territory to link East Prussia. When Poland refused, Germany invaded in September 1939, initiating World War II. The conflict ended with a total remapping of the region; the corridor, Danzig, and East Prussia were eventually incorporated into postwar Poland, effectively erasing the territorial dispute that had dominated the interwar period.
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Sources
- Summary by Intellect · source: Polish Corridor | Danzig, Free City, WWI, & Map | Britannica
- Also: Polish Corridor
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