Hellespont (War of the Two Empires).

Fought 323, between the fleet of Constantine the Great, consisting of 200 small galleys, under Crispus, and that of Licinius, numbering 350 sail, under Amandus. After two days' hard fighting, Crispus forced the passage of the Hellespont, and totally routed the Eastern fleet, with a loss of 130 ships and 5,000 men.