the family of Cyrus the Great, the founder of the empire. Xerxes' mother was Atossa, a daughter of Cyrus. Darius and Atossa married in 522 BC, and Xerxes was born around 518 BC. Upbringing and education According to the Greek dialogue First Alcibiades, which describes typical upbringing and education of Persian princes; they were raised by eunuchs. When reaching the age of 7, they learned how to ride and hunt; at age 14, they were taught by four teachers of aristocratic stock, who taught them how to be "wise, just, prudent and brave". Persian princes were also taught the basics of the Zoroastrian religion, to be truthful, have self-restraint, and to be courageous. The dialogue further added that "Fear, for a Persian, is the equivalent of slavery." At the age of 16 or 17, they began their "national service" for 10 years, which included practicing archery and javelin, competing for prizes, and hunting. Afterwards they served in the military for around 25 years, and were then elevated to the status of elders and advisers of the king. Families in this time, including Xerxes', would intermarry. This account of education among the Persian elite is supported by Xenophon's description of the 5th-century BC Achaemenid prince Cyrus the Younger, with whom he was well-acquainted. Stoneman suggests that this was the type of upbringing and education that Xerxes experienced. It is unknown if Xerxes ever learned to read or write, with the Persians favoring oral history over written literature. Stoneman suggests that Xerxes' upbringing and education was possibly not much different from that of the later Iranian kings, such as Abbas the Great, king of the Safavid Empire in the 17th-century AD. Starting from 498 BC, Xerxes resided in the royal palace of Babylon. Accession to the throne While Darius was preparing for another war against Greece, a revolt was spurred in Egypt in 486 BC due to heavy taxes and the deportation of craftsmen to build the royal palaces at Susa and Persepolis. The king was required by Persian law to choose a successor before setting out on dangerous expeditions. When Darius decided to leave (487–486 BC), he (Darius) prepared his tomb at Naqsh-e Rustam (five kilometers from his royal palace at Persepolis) and appointed Xerxes, his eldest son by Atossa, as his successor. However, Darius could not lead the campaign due to his failing health; he died in October 486 BC