The book is called spastic Spec ops case studies and special operations warfare theory and practice. Carl von Kloswitz in his book on war noted the defensive form of warfare is Intrinsically stronger than the offense. Superiority of numbers admittedly is the most important factor in the outcome of an engagement so long as it's great enough to counterbalance all other contributing circumstances It thus follows that as many troops as possible should be brought into the engagement at the decisive point.