XERXES. Great King of Persia and pharaoh of Egypt (reigned 486–465 BC). According to Herodotos (Book 7), rebellion had broken out in Egypt shortly before the death of Darius I. This might have been led by Psamtik IV, the ruler of the far western Delta (although his rebellion could have been later, c. 470 BC). When Xerxes succeeded his father as king, he prepared the army for an invasion of Egypt. The rebellion was suppressed and Xerxes installed his brother, Achaimenes, as satrap (c. 486/485–459 BC). Achaimenes followed harsher policies than his predecessors and was eventually killed in the rebellion of Inaros, son of Psamtik, which broke out at Xerxes’ death (465 BC).