Actium (Mark Antony's Second Rebellion).
Fought September 2, B.C. 31, between the fleet of Antony, 460 galleys, and that of Octavius, about 250 sail, but much lighter and less well manned than those of Antony. The battle was fiercely contested, with varying fortune; but at a critical moment Cleopatra ordered the Egyptian admiral to make sail, and with 60 galleys withdrew from the fight. She was followed by Antony, and his fleet, discouraged by his flight, surrendered after ten hours' fighting. The Octavians captured 300 galleys, and 5,000 Antonians fell in the action. A few days later Antony's land army of 120,000 men laid down their arms.