The Ten Thousand were a force of mercenary units, mainly Greeks, employed by Cyrus the Younger to attempt to wrest the throne of the Persian Empire from his brother, Artaxerxes II. Their march to the Battle of Cunaxa and back to Greece was recorded by Xenophon, one of their leaders, in his work Anabasis. Between 401 and 399 BC, the Ten Thousand marched across Anatolia, fought the Battle of Cunaxa, and then marched back to Greece.