[Taqwus]

Interesting. If it went like this, it'd be even more important than now to be able to get more details on how much supply consumption/availability there is ahead of time.

e.g. estimations of how much supply you'd have in an enemy border province or how much more would be needed by the troops in your recruitment queue.

Seasons might also make a difference in availability, although if it did a fortress should smooth things out a bit (via an organized system for storing food, rationing it etc).