Along with six other chieftains he hatched a plot to murder Gomates, the usurper to the throne.  Following this, he won the throne in a contest in which victory was determined by whose horse neighed first.  A towering rock known as the Behistun Inscription gives an account of the reign of this son of Hystaspes.  That reign included the building of the Royal Road from Smyrna to Susa and the quellin
Along with six other chieftains he hatched a plot to murder Gomates, the usurper to the throne.  Following this, he won the throne in a contest in which victory was determined by whose horse neighed first.  A towering rock known as the Behistun Inscription gives an account of the reign of this son of Hystaspes.  That reign included the building of the Royal Road from Smyrna to Susa and the quelling of a revolt of several Ionian cities in Asia Minor.  To that end he formed an army led by his son-in-law and nephew, Mardonius.  Though he was defeated at Marathon, FTP, what Persian emperor's fight would be carried on by his son Xerxes?
Along with six other chieftains he hatched a plot to murder Gomates, the usurper to the throne.  
Darius I or Darius the Great