You shall not pass!:
Summary:
It seems to me the new food markets take away a former dynamic of the strategy involved with food. This idea may make it feasible again to starve out an enemy region... or even an ally's region
Details:
As either a diplomatic treaty or a Banker setting, disallow realm X to trade through your realm. When a person goes to make a trade, a route is traced (somewhat like the routefinder for traveling), if no route can be found that does not go through a "disallow trades" realm, then there is a chance of your shipment being confiscated enroute. For example:
Realm A and B are at war.
Realm A has selected to not allow realm B to trade food through realm A's regions.
Realm B needs food for it's city, realm C is offering to sell food.
There is no path from the region selling food in realm C to the city buying food in realm B that does not go through realm A.
Realm B can buy the food, and realm C will be paid, but there is a chance for realm A to confiscate the shipment.
Additionally there could be a chance for each region the food goes through that contains troops from realm A.
Benefits:
It would return the "under siege" feeling, especially on maps like Dwilight where cities are often completely surrounded by their outskirt region. It would also make the scorched earth tactic feasible again.
Possible Exploits:
None that I can think of right now.
