Darius

I. King of Persia 521-485 B.C. He invaded Scythia. subdued Thrace and Macedonia by the hand of Megabazus, began the great conflict with Greece, was defeated at Marathon 490, and left to Xerxes extensive preparations for renewing the war.-II. Nothus, king 424-405 B.C.; father of Artaxerxes II. and Cyrus the Younger.-III. Codomannus, king 336-331; defeated at I us by Alexander 333, and in plains of Gaugamela (Arbela) 331; slain by one of his satraps.