Hannibal
Hannibal kept an army in Italy for many years. Eventually, a Roman invasion of North Africa made him return to Carthage. He lost, and the Romans made him leave Carthage. He lived at the Seleucid court and convinced its emperor to fight Rome. When he lost a naval battle, Hannibal fled to the Bithynian court. When the Romans told him to surrender, he committed suicide by drinking poison.