This chapter will show to what degree the military theories of Bourcet and Guibert had left their mark on French military practice during the Wars of the French Revolution. It will be discussed how, on the one hand, the interplay between military and non-military developments contributed to and, on the other hand, limited the evolution of French operational art. The chapter will demonstrate how operational instruments and improved tactics overcame limitations in warfare which had frustrated Frederick, yet still failed to deliver decisive victory in battle. Finally, the reaction of Prussian military observers experiencing the new form of warfare will be discussed.