One of the largest sailing ships on the sea, a galley has 70 oars on either side. A galley can be any large ship that primarily relies on oars for propulsion, but also contains one to three masts with sails. Galleys typically stick close to the coast, as long ocean voyages are risky in such vessels. They carry many siege engines, of various sizes, and can deploy all of their rowers as boarding (or raiding) troops - although they aren't, necessarily, the best combatants.