Darius I
Also called: Darius the Great
King of Achaemenid Persia (r. 522–486 BC) who organized the empire through satrapies and the Royal Road
From a collateral branch of the Achaemenid house, he seized the throne amid the turmoil after Cambyses II died. In his first year he crushed a series of revolts and justified his rule in the Behistun Inscription. He extended the empire to Thrace in the west and the Indus valley in the east, and completed a canal linking the Nile and the Red Sea. He sent an army to punish Athens for aiding the Ionian Revolt but was defeated at Marathon in 490 BC.