" A successful special operation defies conventional wisdom by using a small force to defeat a much larger or well-entrenched opponent. This book develops a theory of special operations that explains why this phenomenon occurs. I will show that through the use of certain principles of warfare a special operations force can reduce what Carl von Clausewitz calls the frictions of war to a manageable level. By minimizing these frictions the special operations force can achieve relative superiority over the enemy. Once relative superiority is achieved, the attacking force is no longer at a disadvantage and has the initiative to exploit the enemy’s weaknesses and secure victory. Although gaining relative superiority doesn’t guarantee success, it is necessary for success. If we can determine, prior to an operation, the best way to achieve relative superiority, then we can tailor special operations planning and preparation to improve our chances of victory. "

― William H. McRaven , Spec Ops: Case Studies in Special Operations Warfare: Theory and Practice