@History Learner
1204 Constantinople moved - interesting.
The ERE is decapitated but:
- the "Crusaders" do not get the loot
- the "Crusaders" do not gain the infrastructure of The City
Hence I'd imagine that any Latin Statelets to be weaker than on OTL, with Nikea or another successor state coming into its own sooner.
In California the Romans overrun the whole place. With such a large "seeding population" and doubling every 30 years they own North America.
ERE being decapitated, same as OTL, but the long term results are probably better. I don't imagine there would be any Latin States here, at the very least definitely no Latin Empire; the sudden disappearance of an entire city of 400,000 people right before they can take it would probably seem like Divine Intervention to most if not all of the Crusaders. Better to pack up their bags and continue on to Egypt before God gets more
direct with them, I would think. So, I'd imagine no Latin states in Greece but the Empire is still divided up between Nicaea, Epirus, Trebizond and probably Bulgaria.
Long term, without the tempting target of Constantinople I'd imagine Nicaea will focus on reclaiming Anatolia while Epirus will seek to secure Greece and tangle with the Bulgarians a lot. Maybe the ERE will be resurrected later on by marriage alliances and the like, or perhaps the division becomes permanent. At the least, Anatolia (and thus the Balkans at large) remains Christian, as a focused Nicaea can continue to make headway against the Seljuks and finish the job once the Mongols show up.
In North America, meanwhile, yeah you have the aforementioned 400,000 settlers of whom 15,000 at least are skilled professional soldiers and the Navy has roughly ~20 warships. Conquering will be easy, just the administering part will be hard but I imagine a large swathe of the West Coast will be settled by the time the Spanish (or whoever in this ATL) show up. They might not be deep into the interior because of the Rockys, however.