Xenophon accompanied the Ten Thousand, a large army of Greek mercenaries hired by Cyrus the Younger, who intended to seize the throne of Persia from his brother, Artaxerxes II. Though Cyrus' mixed army fought to a tactical victory at Cunaxa in Babylon (401 BC), Cyrus himself was killed in the battle, rendering the actions of the Greeks irrelevant and the expedition a failure. Stranded deep in enemy territory, the Spartan general Clearchus and the other Greek senior officers were subsequently killed or captured by treachery on the part of the Persian satrap Tissaphernes. Xenophon, one of three remaining leaders elected by the soldiers, played an instrumental role in encouraging the Greek army of 10,000 to march north across foodless deserts and snow-filled mountain passes towards the Black Sea and the comparative security of its Greek shoreline cities. Now abandoned in northern Mesopotamia, without supplies other than what they could obtain by force or diplomacy, the 10,000 had to fight their way northwards through Corduene and Armenia, making ad hoc decisions about their leadership, tactics, provender and destiny, while the King's army and hostile natives constantly barred their way and attacked their flanks.