The crossbow is a more complex device than an ordinary bow. It is very difficult to draw back the string of a crossbow once it has been fired: the shooter must either brace the weapon against the ground with his feet while he heaves the string up, or he must employ some kind of mechanical device such as a windlass or lever. This means that a crossbow inhibits the movement of its users compared to a bow, but it is much more powerful and has a longer range.

Troops may not move and fire a crossbow in the same turn. The weapon takes a long time to reload, so if the unit moves it may not shoot.