Antiochus (3) III Megas (the Great (c. 242–187 BCE), second son of *Seleucus (2) II, king of the *Seleucid empire (222–187). After the assassination of his elder brother, *Seleucus (3) III, who was childless, he was called from *Babylon to *Antioch to be king. From the outset he faced many problems within the empire: in the east, a rebellion in *Media led by the satrap Molon (222), with the support of the satrap of Persis, Alexander (brother of Molon); Molon invaded Babylonia, seized the royal capital, *Seleuceia (1) on Tigris, and took the title ‘king’. In the west, *Achaeus (3), viceroy of Seleucid Asia Minor, was in revolt and in control of the royal capital of *Sardis. The Ptolemies still retained control of *Seleuceia (2) -Pieria in north Syria.Within the next 25 years, Antiochus put down the revolt of Molon (220) (Polyb.