Catapults are fairly simple but expensive devices widely used by most races. They utilize leverage and the flexibility of the wooden arm to hurl boulders over a great distance. Made of sturdy wood, catapults can sustain a fair amount of damage before rendered useless. Their size and weight also make them very slow to transport.
Catapults are primarily used in sieges to breach a city's outer wall. The huge boulders hurled by these machines are ideal for such attacks. If a catapult's stone strikes an enemy the damage can be devastating, however, catapults are not particularly accurate against tiny moving targets.