Herodotus mentions that the Ancient Libyan and the Ancient Indian (Sattagydia, Gandhara and Hindush) satrapies supplied cavalry and chariots to Xerxes the Great's army. However, by this time, cavalry was far more effective and agile than the chariot, and the defeat of Darius III at the Battle of Gaugamela (331 BC), where the army of Alexander simply opened their lines and let the chariots pass and attacked them from behind, marked the end of the era of chariot warfare (barring the Seleucid and Pontic powers, India, China, and the Celtic peoples).