The Ballista

The ballista is one of the most powerful units in the game, but must always have backup.

Requirements: Barracks, Lumber Mill, Blacksmith
Advantages: It is very powerful. It is possible to kill a level 1 footman, archer, or peasant in one shot. It can fire 9 spaces away.
Disadvantages: It is very slow and must fire at least 3 spaces away. If someone comes within 1 space it can kill the ballista without taking any damage. Always have backup! Also splash damage may hit your own units if they are standing close enough.