Sun Wu disclosed in his book a series of military rules and principles, and put forward a complete system of military theory.
孙武在书中揭示了一系列具有普遍意义的军事规律，提出了一套完整的军事理论体系。
英语百科
Military theory
Military theory is the analysis of normative behavior and trends in military affairs and military history, beyond simply describing events in war, Military theories, especially since the influence of Clausewitz in the nineteenth century, attempt to encapsulate the complex cultural, political and economic relationships between societies and the conflicts they create.