Book excerpt: The First Four Books of Xenophon's Anabasis is the most famous work of the Ancient Greek professional soldier and writer Xenophon. It gives an account of the expedition of the Ten Thousand, an army of Greek mercenaries hired by Cyrus the Younger to help him seize the throne of Persia from his brother, Artaxerxes II, in 401 BC. Excerpt: "Darius and Parysatis had two sons: the elder was named Artaxerxes, and the younger Cyrus. Now, as Darius lay sick and felt that the end of life drew near, he wished both his sons to be with him."