At the end of the XVIII century the French Revolution radically changed the French army: it became a truly mass, because the draft was introduced. New army required a new permanent structure which would have been able to cope with organization, supply and deployment of a huge number of army units. For that purpose a General Staff was formed in 1792.
Under Napoleon the Staff began to solve issues, which gradually became his main job and survived to our time-it was charged with maneuvering and deployment of troops. Henceforth the General Staff assisted a military commander in managing army units during the battle, and took part in strategic planning.