In Assassins creed:black flag there are a number of large forts scatteted across the carribean.Are any of these forts real?How useful were they?Did pirates really storm them? Can any of these forts be cross referenced with a real world location?

by [deleted]
Rodingen

For those of you unfamiliar with the game, (and to make it generally easier to see the location of these forts) I found a map:

https://guides.gamepressure.com/assassinscreediv/guide.asp?ID=22863