Had a quick look a wiki, 1.5million Germans in East Prussia in 1905 apparently. The Greeks and Turks did a "Population Exchange" of 1.6million in the 1920s and that was with the full support and co-operation of the League and the great powers.
I'd agree the post-WW2 15million Germans moving is not going to happen, but emptying East Prussia seems feasible and there is historic precedent. Also fits with the punish Prussia mood and it makes Poland far more viable as it doesn't have to build a set of ports from scratch.
Means more disputes and finicking over exactly where Poland's western border is too, which should be fun.
The League could go either way, the idea had been knocking around for years and didn't actually depend on Wilson (League propaganda pretended it did, to try and flatter the US into joining). The various international standards committees and groups did good work and did benefit from an overarching, so if there is no League I could still see something come into place if perhaps less ambitious. I so agree though, no mandates and no time limited transfers.
There has to be something, because
no one wants another world war and everyone wants to start getting along again, so some sort of international forum would be great for diplomacy, economy, trade etc, as well as making peacekeeping much more palatable for domestic populations. Coalition peacekeepers sounds much better to contribute towards than the actual British army being in Hessen for however many years, etc.
Plus there's quite a few already international organisations going on, like the Red Cross, that could do with some organisation, regulation and oversight.
Oh, and come to think, they'll be wanting an Entente combined court to try the war criminals and war crimes, which could easily evolve into lets keep that going in the Hague, although a lot of colonial nations will be very uneasy about doing that...even though that idea is probably quite popular everywhere else.
Does anyone really want to blow up Austria Hungary?
A majority of its population, yes. Italy, and probably some old-fashioned French people, too.
Depending on how it loses, there is an argument for keeping it together, just a lot smaller. It would make giving territorial concessions to Italy a lot easier for instance. But that does depend on the state holding together and not being in open revolt by the end, the current early success probably help with that though there is a lot of war left.
It'd be really difficult...it's a feudal collection of countries held together by being owned by one guy, and not particularly strongly at that. Splitting Austria, Hungary, and the rest into three makes a kind of sense, but what lands Austria can keep and meaningfully hold onto is hard to say (it would also look very bordergorey). Hungary has a better chance, if they don't have their own revolution, esepcially not a communist one, but they have quite a few minorities in their kingdom too. That leaves the rest of the Balkans, of which Serbia has to be given something for being a brave little squirt, Montenegro too. Bulgaria and Romania are central power members in full and so could be punished, but how far the Entente wants to weaken a nation bordering Russia...
One thing that does tie all that together, if German is being dismembered does that mostly sate the desire for revenge?
You would think so, right? We went to war, and all three of the major powers against us cease to exist, split into constituent parts, many of which are under Entente thumbs or spheres of influence.
That should satisfy the majority of people, more so than the OTL treaties did anyway.
OTL the Versailles had two parts, the A and B which were people actually expected to get paid and the Class C Reparations which were the huge figures that had no schedule and were mostly for show. If there is no equivalent to the Class C that undercuts a lot of the rhetroic about reparations.
There's no major central power left to pay exorbitant sums, and immediately bankrupting the successor states isn't in anyone's interest what with the communists about and no one wanting another war.
Actually that brings up another good point, all of these new states can start as 'blank slate' and not inherit Germany's wartime debts (which were owed to German citizens so the Entente won't care). Removing that will cause some initial pain, but Germany is going to be in a lot of pain anyway so it can't make much difference and long term it will make reparations easily affordable and build a stronger economy. A related point, I'd imagine Britain will push for all these new German states to have a different currency. Promites local identity, makes unification harder, provides a bit of a barrier to stop economic problems spreading and provides Britains' banking and finance sector with many profitable opportunities.
Britain wants to be
paid post war. The deal with the Entente (between them, France, the Netherlands and Russia so far anyway) is that the others pay their debts and bills post-war, with various colonial spoils as collateral. So they all want/need the defeated central powers to pay up, regardless of whether they are successor states or not. How they figure who owes what to who and how much is going to be extremely contentious on all sides, but something will have to be figured out.
Everyone agreeing that this wipes the other internal debts clean will at least make the German states, Austria and Hungary's position a lot simpler (though their citizen's businesses will lose out short term). It could be a way of aiding unification efforts later if some of the German states figure out some kind of collaborative repayment to their own citizens eventually.
And yes, I can see both France and the UK trying to get everyone separate currencies, so they can get them into their own sterling/franc circle. This I suspect will perhaps succeed in the Rhineland and Hannover, but the further east you go, the more its just whatever the northern country around Berlin uses, or the Bavarian coin. The rivalry between those two is the big stumbling block towards reunification in the East, really.