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Assuming that at some point before the Hitler Stalin Pact that Poland agrees to German demands on it (Danzig, corridor region) and thus there is no war in September 1939, what would Hitlers next moves be?
One development might have been some Italian demand on Yugoslavia, having to do with Croatia, the Dalmatian coast etc. Germany would probably stick by Italy in such a scenario.
In a world without a Hitler Stalin pact, I would venture a guess that the most likely flashpoint, however, might become some kind of German move in the Baltics which would trigger a Soviet counter-move. Perhaps Germany attempts to create either new protectorates over the Baltic states, or tries a softer, Slovakian approach, whereby they become German sattelitte states, with German troops stationed there, but retain technical independence.
Another idea would be for Germany to revisit the Polish situation and come up with more demands against Poland, such as all territory that was lost after WW1 to go back to Germany. This would represent a massive new demand making the Danzig/Corridor look small in comparison. Also, perhaps in conjunction with preparations for a final showdown with Stalin, a demand on Poland that German units be stationed in the Ukrainian portions held by Poland, and maybe German moves to create a mini Ukrainian state in that area, with a capital at Lvov.
My guess is that any such German moves wouldn't have come until 1940.
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