Been working on stuff about this but wanted/needed some input.
Spain and Britain were seemingly constantly at war with one another in the 18th Century and so I'm looking for a British Mexico as a result of one of these conflicts no earlier than the mid-18th Century and no later than 1800.
I understand that Spain weren't punks, so I'm assuming a great misfortune is required to weaken them to that degree. Bad luck? Disease? A pro-British or British supported insurgency in Mexico? Combination of them all?
I don't know, that's why this is your challenge!
Go!
Bonus points go simply to the answer I like the best.