The pirates also had Cuba in my American campaign, within 10 turns, and before the patch, so there was no chance of it being naval invasion. When they had Cuba, they were turning out 1/2 to 2/3 stacks of galleons and fluyts. By the time I got my naval tech up to build 24-pdr frigates, there were 2 of these blockading my ports, after they pretty much swept the sea clean of British.