Assassin's Creed 3 - Guide to freeing the Templar forts
In Assassin's Creed 3 Conquer and liberate the forts of the Templars in addition to being a required action to get to 100% completion of the game, it will also bring you other benefits, such as lowering taxes and increasing convoys revenue.
The forts to be released are 7 in total and they will not be shown on the map until you discover them by visiting them. There are 2 in Boston, 3 in Frontier and 2 in New York.
To conquer them you will always have to proceed in the same way: kill the captain of the fort, destroy the resources and lower the English flag.
In the video below it is shown the exact location of all the forts of the Templars. Good luck!