Complex sentence: Kutuzov, who had learned the military arts under the tutelage of the legendary Russian "Generalissimo" Suvorov, had overall command and would have ample warning of any large-scale French movement.
Split into simpler sentences: Kutuzov, who had learned the military arts under the tutelage of the legendary Russian "Generalissimo" Suvorov, had overall command. Kutuzov would have ample warning of any large-scale French movement.