Darius II died in 404 BC, just before the final victory of the Egyptian general, Amyrtaeus, over the Persians in Egypt. His successor was his eldest son Arsames who was crowned as Artaxerxes II in Pasargadae. He later received the title of Mnemon from the Greeks who found his memory to be exceptional. Even before his coronation, Artaxerxes was facing threats to his rule from his younger brother, Cyrus the Younger.