I was wondering, are there any special events or decisions for the start of the Mexican-American War and the Purchasing of the rest of New England and the Washington state from Great Briton?
To be fair, Russian Oregon is the most logical consequence of in-game mechanics. There is no competitor in central and east Asia, and arctic Siberia/Alaska/Canada offers little. So why not Oregon for Russia?
I agree it's ahistorical. The problem, though, is what prevents Russia settling Oregon from Alaska in real history, and why this factor is not represented in game. And if we want to mod it in, how to?
Without underlining mechanic changes, telling AI not to do that is just telling AI to be dumb.
In one game with the USA i managed to colonize oregon before Russia by ignoring oklahoma which i colonized afterwords the same trick didn't work with Washington the british were already all over that place and it took a bitter war to snatch it from their greedy paws