Proper noun
Polish Corridor
English Wikipedia has an article on:Polish CorridorWikipedia
(historical) A former region of Poland which extended northwards to the Baltic coast and separated East Prussia from the rest of Germany, granted to Poland after the First World War to ensure Polish access to the coast.
Of all territorial settlements made at the end of the World War none has been so frequently criticized as that which we call the Polish Corridor. Richard Hartshorne
Danzig was to return to Germany and there was to be a plebiscite in the Polish Corridor; Poles who had been born or had settled there since 1919 would have no vote, while all Germans born but not living there would. Source: Internet
The German government officially demanded the return of Danzig to Germany along with an extraterritorial (meaning under German jurisdiction ) highway through the area of the Polish Corridor for land-based access from the rest of Germany. Source: Internet
Poland became a separate nation and was given access to the sea by the creation of the Polish Corridor, which separated Prussia from the rest of Germany. Source: Internet
Some felt that the Danzig question was inextricably tied to the problems in the Polish Corridor and any settlement regarding Danzig would be one step towards the eventual loss of Poland's access to the sea. Source: Internet
The suppression of the Polish Corridor would have abolished the economic ability of Poland to resist dependence on Germany. Source: Internet