continuing with The Forced War by David Hoggan...

...The establishment of the so-called Free City of Danzig by the victorious Allied and Associated Powers in 1919 was the least defensible territorial provision of the Versailles Treaty. It was soon evident to observers in the Western World, and to the people of Germany, Poland, and Danzig, that this incredibly complicated international arrangement could never function satisfactorily.

Danzig in 1919 was an ordinary provincial German city without any expectation or desire to occupy a central position on the stage of world politics. The Danzigers would have welcomed special Polish economic privileges in their city as a means of increasing the commerce of their port. They were horrified at the prospect of being detached from Germany and separately constituted in an anomalous position under the jurisdiction of an experimental League of Nations, which did not begin to exist until 1920.

One might well ask what the attitude of the people of Portland, Oregon, would be if their city were suddenly detached from the United States and placed under the jurisdiction of the United Nations in the interest of guaranteeing special port facilities to Canada near the estuary of the Columbia River. It would be small consolation to recall that the area around Portland, before passing under the sovereignty of the United States in 1846, was settled by the British Hudson Bay Company. The traditionally friendly relations between Canadians and Portlanders would soon deteriorate under such exacerbating conditions.

It is not surprising that the National Socialists of Adolf Hitler won an electoral majority at Danzig before this was possible in Germany. The Danzigers hoped that perhaps Hitler could do something to change the intolerable conditions established during 1919 and the following years. It was easy in 1939 for Margarete Gärtner, the National Socialist propagandist, to compile extensive quotations from approximately one hundred leading Western experts who deplored the idiocy of the Danzig settlement of 1919. Her list was merely a sampling, but it was sufficient to substantiate the point that at Danzig a nasty blunder had been made.
https://exploringrealhistory.blogspot.com/2020/06/part-2-forced-warthe-danzig-problem.html