Dwarven Ballista

Crossbows and siege engines are Dwarven specialties, and are vastly preferred to less complicated devices like bows, slings and the like. Dwarven ballista crews are deadly accurate, and can reload and fire fast enough to break up almost any enemy advance.

Kaspar's Comment

Thanks to their ballistae, the Dwarves can turn all but the most barren position into a stronghold with astonishing speed.