Darius III (c. 380 – July 330 BC), originally named Artashata and called Codomannus by the Greeks, was the last king of the Achaemenid Empire of Persia from 336 BC to 330 BC. Artashata adopted Darius as a dynastic name.After Artaxerxes III of Persia and all of his sons were killed by the vizier Bagoas, the vizier installed a cousin of Artaxerxes III, Artashata, on the Persian throne as Darius III.