A newbie asks...

[krpeters]

Originally Posted by JonBrave

As I understand it, each fort takes from adjacent land; if my forts overlap I am actually losing a bit? So I don't build many forts.

Each fort uses 100% of the production of the province it is in, and some percent of surrounding provinces. If an adjacent province shows a production of zero, surrounding forts have fully used it. Otherwise, there's still benefit to building a fort there, even though it is a sub-optimal use of gold.