 With Publius Ventidius Bassus returned to Rome in triumph for his defensive campaign against the Parthians, Antony appointed Gaius Sosius as the new governor of Syria and Cilicia in early 38 BC.Antony, still in the West negotiating with Octavian, ordered Sosius to depose Antigonus, who had been installed in the recent Parthian invasion as the ruler of Hasmonean Judea, and to make Herod the new Roman client king in the region.Years before in 40 BC, the Roman senate had proclaimed Herod "King of the Jews" because Herod had been a loyal supporter of Hyrcanus II, Rome's previous client king before the Parthian invasion, and was from a family with long standing connections to Rome.