The Battle of Actium in 31 BCE was fought primarily between the fleets of

Explanation

At Actium in 31 BCE, Octavian's navy, commanded by Agrippa, defeated the joint fleet of Antony and Cleopatra, deciding the contest for control of Rome. Lepidus and the Senate were not the combatants, Brutus and Cassius had already died years earlier at Philippi, and Sextus Pompey's earlier conflict with Octavian was a separate, previous episode.