Xerxes

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…world would except instead of herself [Herodotus book 7 section-114]. In 465BC Xerxes was found murdered in his bedchambers. According to Cameron and Lawless, specific details on the death of Xerxes are unknown. It suggests that Artabanus, the commander of the palace guards murdered him with the help of Aspamitres, a court eunuch [pg.100]. Therefore Xerxes ended his reign of the Persian Empire as a victim of palace conspiracy and was succeeded by his son Artaxerxes.