Walls are tall and can be built in linear arrays, with varying width. They can connect gatehouses and towers. From the ground, they are accessible through stairs or another gatehouse. Multiple wall lines can be built next to each other, granting theoretically infinite thickness.
Foot soldiers can mount walls, where they gain height and range advantage.Attacks coming from lower ground have a miss chance and lower damage on units in elevated positions. Braziers can also be placed on them, which allow the shot of fiery arrows for archers, rangers and Arabian bowmen.
Walls may be damaged by melee attacks and catapulted rocks, of which the latter causes collateral damage to adjacent structures. If a wall segment is damaged, it becomes lower in height and sends units atop flying. Stones may fly over damaged walls or even crush units on it. They can be repaired by simply erecting a new wall line over it or with the help of the repair tool.