@carlton_bach can i ask about the aftermath for the mittleuropa countries (is there a name for the group of countries that got independence in the baden baden treaty?) after the second war. How national identity develop will it be much more stronger due to the war? So will Ukranians be more distintct in this world to russian than in otl? will places such as poland had low russian populations some of the baltic countries and ruthania have big russian population will they be expelled after the end of the second war? Is there any other information you could share please on these nations.
edit: realised never got sent
Much of the Russian speaking population was expelled from Poland, the Baltics and Finland in the aftermath of the First War. So these are not a big issue, and the 'population exchanges' were useful for the new governments. They established their capabilities - you can't not have effective organs of government idf you need to adjudicate tens of thousands of property claims - they allowed them to be seen to care, giving land and homes to refugees, and reward their veterans (tens of thousands of Polish NA men received farms and homes that had been vacated by Russian speakers). The disruption of the war also destroyed lots of old allegiances, so that helped to create new primary identities based on language and nation.
National identity is a ticklish issue, though. Poland, Finland and Lithuania have been quite successful at building up a national identity in the German mould, based on language, culture and Volk identity. Latvia, Estonia and Ruthenia (that would be Ukraine) less so. But all of the countries have problems with having a staatsvolk, and these troubles don't end with the Second War.
The first thing is that most of them are mutual minority hosts. The establishment of Baden Baden enforces minority rights, too, so Poles in Lithuania and Ruthenia, Ruthenians in Poland, Letts in Lithuania etc. enjoy protections for their culture and language. You can't just enforce a one country-one language policy. In times of tension (and especially after Russia is defeated, the absence of a common enemy feeds those tensions), that can become a major irritant.
Secondly, there are issues of class interlinked with ethnicity, and it doesn't help that the Baden Baden rules try to fossilise the status quo. This is the biggest issue for Finland, which has grown a powerful sense of uinitary nationhood and struggles with the fact that so many of its ruling class, of the leaders and officers of its independence movement, of its prime ministers and great writers - speak Swedish. But the Polish minority in Lithuania and Ruthenia is in a similar position.
The biggest irritant in the Baltics is the German minority. It's big, it's influential, it has direct channels to Berlin and it is ready to play on them. That ensures them a privileged position beyond what anyone else there can hope for.
And there are the Jews, who also enjoy protection by Germany (in the interest of the status quo, and because they are unswervingly loyal to the Kaiser). Mainly in Poland and Lithuania, they are numerous and - it's not fair to say they are privileged, influential or wealtrhy the way the Finnish Swedes or Baltic Germany are, but they are privileged and wealthy beyond what their neighbours think Jews should be.
After the Second War, with Ruthenia and Estonia growing eastward, these countries take in larger Russian-speaking minorities they immediately begin assimilating quite forcefully. Across most of the other states of the German periphery, there is above all a desire for reestablishing normality, It makes for a tense mixture of national triumphalism and an artificial "all-in-this-together-ness". In Eastern AH, though, where the Russians used national identities more successfully to sow dissension and stir up trouble, it's a much harsher story. Nobody in Mitteleuropa will ever cooperate with Moscow, no matter how much their own governments suck.