Original sentence: It has been adopted from the french term meaning "to leave" or "to go out" with a specific purpose.Sortie is a term for deployment or dispatch of one military unit, be it of aircraft, ship or, in older times, of columns of troops from a fort.The unit usually has a purpose of accomplishing a specific mission, whether alone or with other aircraft or vessels
Edited sentence: It has been adopted from the French meaning "to leave" or "to go out" with a specific purpose.Sortie is a term for deployment or dispatch of one military unit, be it an aircraft, ship, or troops from a strongpoint.The sortie, whether by one or more aircraft or vessels, usually has a specific mission