Regarding the real-world German Nationalsocialists and the 1939 situation with Poland, though:
https://archive.is/sPVcChttps://archive.is/krBrLhttps://archive.is/0CWkbhttps://archive.is/JauWNhttps://i.imgur.com/nKqnYPj.pngBefore the German military entered Poland, there were already 80 000 German refugees in camps in Danzig and elsewhere in the Reich. The week before Germany entered Poland to save the ethnic Germans from extermination, the Polish communist-controlled radio broadcasted calls to liquidate the Germans in Poland -- 60 000 Germans in Poland were killed that week alone.
Poland had undergone a full mobilization on 30 August. She had been partially mobilized long before this. Jozef Beck's insufferable chauvinism and the Earl Of Halifax were principally to blame for the outbreak of the war. The Poles under Beck refused to even discuss Germany's very reasonable demands, which were the return of Danzig and the right to a super-highway across the corridor. Polish ambassadour Lipski was incensed and depressed at the actions and irrational behaviour and stubborness of his superior Beck.
The very best source for the truth on this matter is David Hoggan's excellent book The Forced War. It's a huge book that goes into great detail with extensive bibliography and notes.
