Stresa defeats Germany, Bigger Poland

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What if the Stresa Front, having held together, defeats Germany in an Anschluss War and Poland proceeded to expand by annexing Danzig/Gdansk, Easternmost Pomerania, Upper Silesia, and Masuria?
 

BigBlueBox

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What if the Stresa Front, having held together, defeats Germany in an Anschluss War and Poland proceeded to expand by annexing Danzig/Gdansk, Easternmost Pomerania, Upper Silesia, and Masuria?
Is Poland allowed to expel the Germans from those territories? If not, Poles could become dangerously close to losing demographic dominance in their own country. If the Stresa Pact does allow Poland to expel Germans then if Czechoslovaks hear about that then they are likely to join the war as well and get their own chunk of Silesia (and maybe Sorbian Lusatia). The Soviets would probably insist that Czechoslovakia gets a big chunk of Silesia because they don’t want Poland getting too strong.
 
Is Poland allowed to expel the Germans from those territories? If not, Poles could become dangerously close to losing demographic dominance in their own country. If the Stresa Pact does allow Poland to expel Germans then if Czechoslovaks hear about that then they are likely to join the war as well and get their own chunk of Silesia (and maybe Sorbian Lusatia). The Soviets would probably insist that Czechoslovakia gets a big chunk of Silesia because they don’t want Poland getting too strong.

Poles were 2/3 of Poland OTL, with Poland having ~39million in 1939.
Danzig had some 400,000 people, of which upwards of 11% were Poles.
Upper Silesia had some 1.3 million people in 1925, of which 530,000 were Polish (according to Polish sources).
The Southern portion of East Prussia was Polish-speaking. The locals were Protestant Masurians who, while linguistically Polish, were historically loyal to the Protestant Prussians.
Eastern Pomerania had about 834,000 people, almost all of whom were German.

If Poland doesn't expel any Germans, then it'd still be Polish-majority.
 
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