Anabasis (; "An Ascent"/"Going Up") is the most famous work, in seven books, of the
Greek professional soldier and writer
Xenophon. The journey it narrates is his best known accomplishment and "one of the great adventures in human history," as
Will Durant expressed the common assessment. Although the content of the book is lively, written in the style of someone who has participated in the adventures he describes, the story recounted in the
Anabasis is completely uncorroborated.