Tigran the Younger is one of the sons of the Armenian king Tigran II the Great . Tigran the Younger was married to the daughter of the Parthian king Phraate III . During the campaign of the Roman commander Gnei Pompey the Great to the East, he switched to his side in order to become the Armenian king with the help of the Romans. 66 BC An Armenian-Roman agreement was signed in Artashat , according to which Tigran the Younger became king of Sophena . Dissatisfied with this and the fact that Armenia will pay indemnity to the Romans from the taxes of Sophena, he opposed Pompey and was arrested. He was taken captive to Rome , where in 63 BC spent in Rome at the triumph of Pompey . After that he was killed.