Each siege will keep track of the defenders' supplies, average health and fortifications. During sieges, certain events can happen by default every 20 days (shortened by 30% to only 14 days with {{iconify|Military Engineer}} commander), which can lower one of those. Walls can only be damaged if the attacking army has Siege Weapons. | Each siege will keep track of the defenders' supplies, average health and fortifications. During sieges, certain events can happen by default every 20 days (shortened by 30% to only 14 days with {{iconify|Military Engineer}} commander), which can lower one of those. Walls can only be damaged if the attacking army has Siege Weapons. |