Question: Mark Antony and Cleopatra and the Sergii family brothers participated in what battle?
Sentence (from "Battle of Actium"): The Battle of Actium was the decisive confrontation of the Final War of the Roman Republic, a naval engagement between Octavian and the combined forces of Mark Antony and Cleopatra on 2 September 31 BC, on the Ionian Sea near the promontory of Actium, in the Roman province of Epirus Vetus in Greece.
Relevant evidence: Yes