The key to the system was the speed with which the corps could move. Napoleon would give the marshals their mission, then let them accomplish it on their own. Little time was wasted with the passing of orders back and forth, and smaller armies, needing less baggage, could march with greater speed. Instead of a single army moving in a straight line, Napoleon could disperse and concentrate his corps in limitless patterns, which to the enemy seemed chaotic and unreadable.
