WI: Prusso-Polish state in the 19th century

Your challenge, should you choose to accept it, is to craft a scenario with a POD no earlier than 1790 wherein the Kingdom of Prussia and most (if not all) of Europe's Polish-speaking lands are united within a single state.

There must be significant legal protections for either Germans or Poles, whichever the situation necessitates.
 
Austria cannot participate in the third Partition of the Polish-Lithuanian Commonwealth and the lands it gained in 1795 OTL are given to Prussia?

Then Austria decides to align with France, and in a TTL Congress of Vienna (likely not Vienna, then), it is punished by taking away Galicia and giving it to Prussia?
 
Austria cannot participate in the third Partition of the Polish-Lithuanian Commonwealth and the lands it gained in 1795 OTL are given to Prussia?

Then Austria decides to align with France, and in a TTL Congress of Vienna (likely not Vienna, then), it is punished by taking away Galicia and giving it to Prussia?

Sounds reasonable, but how do you ensure long-term legal protections for the Poles? Undoubtedly, there will be significant discrimination against them, just as in OTL.
 
Napoleon dies in 1808.

Prussia immediately moves to repossess the Duchy of Warsaw taken from it the year before. The Poles want this to be a personal union rather than a straight re-annexation. The King of Prussia also has his beady eyes on possible acquisitions in Saxony and Westphalia, so is anxious to settle his eastern front asap. He agrees.

From here the butterflies multiply, but somewhere down the line there's a war between Prussia-Poland and Austria. P/P wins and acquires the Polish provinces of Austria as well.
 
Austria cannot participate in the third Partition of the Polish-Lithuanian Commonwealth and the lands it gained in 1795 OTL are given to Prussia?

Then Austria decides to align with France, and in a TTL Congress of Vienna (likely not Vienna, then), it is punished by taking away Galicia and giving it to Prussia?
If Austria aligns with France,there most likely won't be a French defeat.
 
I would suggest that simple numbers may be enough to guarantee Polish strength. If Poles, complete with their nobility and the core of their old territory, form the single largest population group within the Prussian monarchy, or close to the single largest, then said monarchy is going to have to be minimally responsive to Polish concerns if it is going to survive. If not, then it may not survive.
 
I would suggest that simple numbers may be enough to guarantee Polish strength. If Poles, complete with their nobility and the core of their old territory, form the single largest population group within the Prussian monarchy, or close to the single largest, then said monarchy is going to have to be minimally responsive to Polish concerns if it is going to survive. If not, then it may not survive.
Something like Ausgleich, but for Prussia and Poland then?
 
Something like Ausgleich, but for Prussia and Poland then?

I do not think it would be so easy. The Lands of the Crown of St. Stephen were many things, but at least they were clearly separated by the border with Cisleithenia. That this border largely corresponded to the ethnic border between Germans and Magyars was a decided plus: I am unaware of any Austrian Germans particularly concerned with the fate of their co-ethnics in Hungary. The German/Polish ethnic frontier was much more chaotic, not only in the lands of the former Poland-Lithuania but even in thoroughly Prussian Silesia.

Could we get a deal? Maybe. Could we also get a huge mess? Sure.
 
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