What was the primary warship of the Byzantine navy?

The dromon was the primary warship of the Byzantine navy until about the 12th century. It developed from the light galleys of the late Roman fleet and became the characteristic Byzantine naval vessel during the empire’s long wars with Arab powers.

The Greek word dromon is related to a root meaning “runner,” reflecting the ship’s reputation for speed. Dromons were oared war galleys, usually equipped with sails as well. Their design changed over time: later and heavier versions could carry more soldiers, marines and artillery while retaining substantial maneuverability.

Dromons fought in both ship-to-ship battles and coastal operations. Byzantine crews used weapons such as Greek fire, a secret incendiary compound that could burn on water. Greek fire was especially important during the Arab sieges of Constantinople, when Byzantine naval forces used it to destroy or scatter enemy fleets.

The dromon is sometimes casually called a galley, but “galley” is a broad category rather than the specific Byzantine type. It should also not be confused with the classical trireme, whose design and tactical role belonged to an earlier era. By the later Middle Ages, other ship types increasingly replaced the dromon.