Let me just say that this is an absolutely incredible timeline. I haven't read too many on the site yet, but this is hands down my favourite thus far. The Second Great War and the portions leading up to it were... dare I say... epic. I can't wait to see what you come up with next!
I do have a couple of questions, if you don't mind...
First, what happened with Greece? This is almost positively due to me missing section on it, but last I remember they were a French puppet, with a Bonaparte on the throne... now we have an Alexander fellow plotting with Russia and invading the Ottoman Empire. Again, I'm sure this is due to me missing something about them, but could you explain what happened?
Second, how was Canada doing in both of the wars? In OTL WWI and II, Canada was a fairly big force for the British (more so in I than II), so it just strikes me as a tad strange they haven't been mentioned except in passing. Admittedly, this isn't so much as fault as it is wondering how my country's doing.