Arses, known by his regnal name Artaxerxes II, was King of Kings of the Achaemenid Empire from 405/4 BC to 358 BC. He was the son and successor of Darius II and his mother was Parysatis.
The Rock relief of Artaxerxes II in Persepolis
Retreat of the Ten Thousand, at the Battle of Cunaxa, Jean Adrien Guignet
Armoured cavalry of Achaemenid Hellespontine Phrygia attacking a Greek psiloi at the time of Artaxerxes II and his Satrap Pharnabazus II, Altıkulaç Sarcophagus, early fourth century BC
The King's Peace, promulgated by Artaxerxes II in 387 BC, put an end to the Corinthian War under the guarantee of the Achaemenid Empire.
Old Persian is one of two directly attested Old Iranian languages and is the ancestor of Middle Persian. Like other Old Iranian languages, it was known to its native speakers as ariya (Iranian). Old Persian is close to both Avestan and the language of the Rig Veda, the oldest form of the Sanskrit language. All three languages are highly inflected.
Close-up of the Behistun inscription
An Old Persian inscription in Persepolis