Without WW1 this Revolution will never succeed, EVER.
Nicky didn't use the war that way, he entered in the war for geopolitical reasons not really because he cared about his popularity (the guy legitimately thought the Russians loved adored him). You are right that the war at the beginning saw...
Certainly being exploited by the Germans is enough to make it pass from, at the very least, a strong movement from autonomy to an independence movement from the German occupier, and IMHO there was a strong nationalist movement in Ukraine.
Once Karl takes power a peace deal is possible and he was willing to even make concessions to guarantee peace but the other powers are not willing to do so.
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What do you mean by "sees fighting an outside enemy as a way to not have to have an internal fight"?
I think the US would still win, the South is starving due to the blockade and is struggling to maintain the war effort but it would be much more difficult to win if the South had the population of the North. However I don't understand why Lincoln wouldn't proclaim the emancipation proclamation.
Just because he's kid doesn't mean he doesn't have rights to succession, his brothers could eliminate him if they play their cards right but it also depends on how friendly are relations between the two. Pepin will probably let him succeed, succession law divided the inheritance amongst all...
Since the succession law divided the inheritance among all sons, yes the empire gets divided. I could certainly see them trying to fight each other to get each other's territory.
Byzantium isn't going to take over Egypt anytime soon, after the initial Arab invasions they never went much further than Antioch, let alone Egypt. And the ERE had some troubles with the Seljuks and Normans at that point so it's very doubtful they can do anything.
Why don't we invade North Italy? It's rich and theoretically not impossible we succeed. Why not invade the ERE? It's rich and up until this point has proven itself to be weak.
Really this kind of argument can apply itself to a lot of places other than Egypt and they're easier to invade.