The last inscription mentioning Artaxerxes I being alive can be dated to December 24, 424 BC. His death resulted in at least three of his sons proclaiming themselves Kings. The first was Xerxes II, who was reportedly his only legitimate son by Queen Damaspia and was formerly Crown Prince. He was apparently only recognized in Persia. The second was Sogdianus himself, possibly recognized in Elam. The third was Ochus, son of Artaxerxes I by his concubine Cosmartidene of Babylon and satrap of Hyrcania. Ochus was also married to their common half-sister Parysatis, daughter of Artaxerxes I and his concubine Andia of Babylon. The first inscription of Ochus as Darius II can be dated to January 10, 423 BC. He seems to have been recognized by Media, Babylonia and Egypt.
This chaotic state of affairs would prove short-lived. Xerxes II only ruled forty five days. He was reportedly murdered while drunk by Pharnacyas and Menostanes on Sogdianus' orders. Sogdianus apparently gained the support of his regions. He was himself killed by Arbarios, commander of the cavalry. He had only reigned for six months and fifteen days. Darius II became the sole ruler of the Persian Empire and would reign till 404 BC.