He was chiefly responsible for the victory over Mark Antony at the Battle of Actium in 31 bc, and during Augustus' reign he suppressed rebellions, founded colonies, and administered various parts of the Roman Empire. Of modest birth but not a modest man, Agrippa was disliked by the Roman aristocracy.

Herod Agrippa I (born c. 10 bce—died 44 ce) was the king of Judaea (41–44 ce), a clever diplomat who through his friendship with the Roman imperial family obtained the kingdom of his grandfather, Herod I the Great. He displayed great acumen in conciliating the Romans and Jews.

Agrippa is a follower of Caesar. At the meeting of Antony and Caesar, he suggests that Antony marry Octavia to cement the friendship of the two men. After they have left, he asks Enobarbas about Cleopatra.