Xenophon. Born in 430 B.C. A Greek historian and philosopher. Xenophon played an important part in the adventurous retreat known in history as the "Retreat of the Ten Thousand," the description of which he wrote in "Anabasis." His other works are "Memorabilia," or "Recollections of Socrates." "Hellenica," a continuation of Thucydides' History of the Peloponnesian War; and the "Cyropaedia," or "Education of Cyrus." Died 357 B.C.