 The sudden change came with no corresponding officer training; new units were led by commanders who had not been given sufficient tactical training in using their units.Austrian cavalry forces were regarded as the best in Europe, but the detachment of many cavalry units to various infantry formations precluded the hitting power of their massed French counterparts, who could, at the orders of Napoleon, amass a whole corps of cavalry to influence the battle.The Ulm campaign lasted for nearly a month and saw the French army under Napoleon deliver blow after blow to the confused Austrians.