The Battle of Actium was a naval battle fought between a maritime fleet led by Octavian and the combined fleets of both Mark Antony and Cleopatra VII Philopator. The battle took place on 2 September 31 BC in the Ionian Sea, near the former Roman colony of Actium, Greece, and was the climax of over a decade of rivalry between Octavian and Antony.
In early 31 BC, the year of the battle, Antony and Cleopatra were temporarily stationed in Greece. Marc Antony possessed 500 ships and 70,000 infantry, and made his camp at Actium, and Octavian, with 400 ships and 80,000 infantry, arrived from the north and occupied Patrae and Corinth, where he managed to cut Antony’s southward communications with Egypt with help from Marcus Agrippa. Octavian previously gained a preliminary victory in Greece, where his navy successfully ferried troops across the Adriatic Sea under the command of Marcus Agrippa. Octavian landed on mainland Greece, opposite of the island of Corcyra and proceeded south, on land.
Trapped on both land and sea, portions of Antony's army deserted and fled to Octavian's side, and Octavian's forces became comfortable enough to make preparations for battle.