This is a really good timeline, I hope it continues.
France and Britain will be a ways better off by the end of the century in TTL, but they'll still be in Berlin's shadow.
There is a number of assumption that may or may not be valid.Yes germany would eclipse Britain and France in its GDP, but that would not tell the whole story as much of the larger German GDP will have to be spent on keeping up with the Americans as well as the Japanese militaries.
There is a number of assumption that may or may not be valid.
1) Germany has to keep up with the Americans? More likely the other way round. Who exploded the first superbomb? Answer Germany. There is no reason why they may not be ahead in other areas from rocketry to computing machines.
2) The Japanese are a major threat to the America. They are only a minor threat to Germany because it has just Papua New Guinea and a few Pacific islands which it could easily write off. Its main spheres are Eastern Europe, Africa and the Middle East, all out of reach or on the periphery of the Japanese's range.
In fact given that it is not involved in an arms race, took far less damage in the war than most other coutntries and has one of the two largest spheres of influence for exports, it is most likely that Germany and not the USA that will be the world leader.
I did not say anything about the Germans dropping behind either militarily or technologically. In fact because they need less hardware they can spend the difference on research and as per the Cold War use that as their edge.Germany cannot afford as one of the big 3 to fall too far behind both militarily and technologically. All of these things cost and nations on the fringe will pick up the benefit of this by being cheaper thus draining away even more of the German GDP.
I did think that many of the minorities will get a fair deal unless central governments are enlightened and given that they are imperialist or ex-imperialist I don't think they will be.In TL 191 the call for Civil Rights is never happens, meaning imperialism will continue well into the 21st century. As some nations become stronger they too will continue to conquer lands and claim territories. In OTL Argentina was pretty well off at this time before it had a major economic downturn if this never happens it might be an interesting new rival to the big 3 (US Germany Japan).
The second option would be a much more violent reaction against imperialism and militarism in this world. Remember we have a lot of new minorities including ex-confederates and canadians in the US and Germany and Japan also have a fair deal. What would a figure like OTLs Che Guevara, someone who fights for the little guys be like in this TL. I can see Alec Pomeroy, or someone similar, traveling the world and inspiring people to fight against the new empires.
(Che fought in Bolivia Cuba and Congo and is a symbol of self determination for all of those who were affected by imperialism).
One question though, did West Virginia annex Virginia? In the maps a few pages back it looks as if it did. That would be interesting, I assume the Virginia capital would be in Wheeling rather than Richmond. I also assume the population of West Virginia would be much larger, and the economy healthier with military spending and industry likely being based there.
The next war between Japan and the USA is going to be even nastier than the Pacific War on OTL. It would be reasonable to assume that Japan would have a few nuclear armed ICBMs and when Operation Olympic to be finally launched they would fire them at the USA. Given the USA knows that, they would be advised to develop ABMs.I'm looking forward to the next round between the US and Japan. Hopefully it will be more conclusive than how HT did it.