Expedition
late Middle English: via Old French from Latin expeditio(n- ), from expedire ‘extricate’ (see expedite). Early senses included ‘prompt supply of something’ and ‘setting out with aggressive intent’. The notions of ‘speed’ and ‘purpose’ are retained in current senses. expedition (sense 1) dates from the late 16th century.
wiktionary
From Middle French expédition, and its source, Latin expeditio
etymonline
expedition (n.)
early 15c., expedicioun, "military campaign; the act of rapidly setting forth," from Old French expedicion "an expediting, implementation; expedition, mission" (13c.) and directly from Latin expeditionem (nominative expeditio) "an enterprise against an enemy, a military campaign," noun of action from past-participle stem of expedire "make ready, prepare" (see expedite). Meaning "journey for some purpose" is from 1590s. Sense by 1690s also included the body of persons on such a journey.
