Afterward, on the death of Antiochus the Great, his
son Seleucus succeeded him. He gave his son Demetrius as a hostage in place of his brother Antiochus. When the latter arrived at Athens on his way home, Seleucus was assassinated as the result of a conspiracy of a certain Heliodorus, one of the court officers. When Heliodorus sought to possess himself of the government he was driven out by Eumenes and Attalus, who installed Antiochus therein in order to secure his good-will; for, by reason of certain bickerings, they had already grown suspicious of the Romans. Thus Antiochus, the son of Antiochus the Great, ascended the throne of Syria. He was called Epiphanes (the Illustrious) by the Syrians, because when the government
was seized by usurpers he showed himself to be their
true sovereign. By cementing the friendship and alliance of Eumenes he governed Syria and the neighboring nations with a firm hand. He appointed Timarchus as satrap of Babylon and Heraclides as treasurer, two brothers, both of whom had been his favorites. He made an expedition against Artaxias, king of Armenia, and took him prisoner.