Count Moritz of Saxony, chief marshal of France, the greatest commander and military theorist, in his treatise on military affairs examines all aspects of the preparation and conduct of war. He puts forward ideas that were new for his time about the need for conscription and military personnel, about cavalry tactics, the use of light artillery, the role of engineering fortifications on the battlefield and the importance of the moral element in war. For many years, his work served as the basis for the study of military art. More than one generation of military leaders was guided by Napoleon’s famous principles. W. Cairns in his collection not only offers the strategic and tactical principles of Napoleon for study, but also examines their effect on the example of campaigns conducted by recognized commanders. Thus illustrating and proving that the defeat and success of military operations depend on the natural genius and knowledge of the commander-in-chief.