Anabasis (/əˈnæbəsɪs/; Greek: Ἀνάβασις Greek pronunciation: [anábasis] (literally an "expedition up from") is the most famous work, published in seven books, of the Greek professional soldier and writer Xenophon. The text was composed around the year 370 BC, and in translations, Anabasis is rendered The March of the Ten Thousand or The March Up Country. The journey it narrates is his best known accomplishment and "one of the great adventures in human history," as Will Durant expressed it.