Artaxerxes II Mnemon /ˌɑːrtəˈzɜːrksiːz/ (Old Persian: , meaning "whose reign is through truth") was king of Persia from 404 BC until his death in 358 BC. He was a son of Darius II and Parysatis.
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.
Four years earlier, Cyrus was appointed by his father as the supreme governor of the provinces of Asia Minor. There, he managed to pacify local rebellions and become a popular ruler among both the Iranians and Greeks. Towards the end of 405 BC, Cyrus became aware of his father’s illness. By gathering support from the local Greeks and by hiring Greek mercenaries commanded by Clearchus, Cyrus started marching down towards Babylonia, initially declaring his intention to crush the rebellious armies in Syria.