Anabasis (from Greek ana = 'upward', bainein = 'to step or march') is an expedition from a coastline up into the interior of a country. Anabase and Anabasis may also refer to: Anabasis (from Greek ana = 'upward', bainein = 'to step or march') is an expedition from a coastline up into the interior of a country. Anabase and Anabasis may also refer to: