'anabasis' originates from Greek, specifically the word 'anabainein,' where 'ana-' meant 'up' and 'bainein' meant 'to go.'

'anabainein' transformed into the Latin word 'anabasis,' and eventually became the modern English word 'anabasis.'

Initially, it meant 'a going up or ascent,' but over time it evolved into its current meaning of 'a military advance or expedition.'