Darius

Name of three emperors in the Persian dynasty of the legendary King Achaemenes. A Darius appears in the biblical books of Ezra, Nehemiah, Haggai, and Zechariah as a Persian king, and in the book of Daniel as a Mede who became king over the Chaldeans (Dn 9:1).

Also known as Darius Hystaspes and Darius the Great, Darius I seized the throne of the Persian Empire after the death of Cambyses II. Although he was an Achaemenid, he was from a different branch of the royal family than Cyrus and Cambyses, and his authority was not accepted in all the provinces. After Darius quelled several revolts, however, his power was firmly established, and he turned his attention to expanding the empire. His military campaigns extended Persian borders to the Danube River in the west and to the Indus River in the east, making him ruler of the largest empire the world had known. Greco-Persian conflict, which continued until Alexander the Great conquered the empire in 330 BC, began when Darius launched two invasions of Greece after conquering Thrace and Macedonia. The first expedition was destroyed by a storm in the Aegean Sea; the second was defeated by the Athenians in the famous battle of Marathon in 490 BC.