OK geez.... Yeah that's true, armies have never been affected by plagues, if one of your cities has plague, just move all none required troops outside the city.

Then what about armies reaching a certain level of out of supplies reaching starvation would begin to suffer from desertion (such as a crusade) or if that could be done, suffer attrition damages just as the besieged army.

Well, has EB developer team though about anything that could make siege warfare more realistic ??? Would be nice to know your ideas, thx