The logistic aspect is a great idea and also highly realistic and historical. Having read, Supplying War, a book from Martin Van Creveld, I can tell that the system you've incorporated in the game(within the limitations of the game engine) is really close to what reality was concerning logistics for ancient and medieval armies. Armies were able to bring some supplies with them and get some more from their homeland but ultimately were forced, as they went deeper and deeper into enemy, to live on the country. So having stacks resupplying themselves when they devastate a tile, when they pillage a town or when they get back in friendly territories is really realistic.

I'm simple curious to know, is it to possible for an army to stay on the same spot and keep on resupplying itself even though the tile has already been devastated?? Also, what is the most severe penalty a stack may receive if it stays for a really long time without supplies ?? Because so far, of what I have seen, the only penalties I saw were moral penalty, is there like famine and disease penalties included already or planned for EB2 ??