In next update (will be released in next few hours), i plan to implement new foraging system. Its relatively simple - every army will now take 1 food from the faction pool, and 1 food from local region food pool (previously, army eat 2 food from faction pool). So, if army is stationed in own province, it will "eat" 2 food. If such army will march to enemy region, it will eat 1 food from own stocks and 1 food as forage from enemy. Besieging unit will now eat 1 food from own storage (previously 4) and 4 food from enemy local region. Raiding army will eat 4 food from local region (will live completely off the enemy land)