Anabasis, a Greek word signifying originally ascension, then a campaign or march from a lower to a superior region; for example, from the shores of a sea to the interior of a country. In this signification the word forms the title to two historical works of antiquity: the one, by Xenophon, describing the anabasis or campaign of Cyrus the Younger against his brother Ar-taxerxes II., and the celebrated retreat of the 10,000 Greeks, auxiliaries of Cyrus, from the battlefield of Cunaxa, where that prince perished, to the shores of the Euxine; and the other by Arrian, relating the anabasis or campaigns of Alexander the Great.