Castles and resource-sucking : a suggestion

[Psitticine]

Forts definitely boost supply in Dom II and that boost is also present in diminishing levels in neighboring provinces.

I'm not 100% sure, but I believe the Supply value is added to the provincial Supply value when there is no siege occuring. When there is a siege, the troops inside the fort are forced to rely on just the fort's Supply as they can't get out to gather the provincial supplies.

(P.S. Sorry for not posting a response to this sooner. I'm having some difficulties keeping up with everything right now!)