The 33 Strategies of War, Strategy 6, Segment Your Forces, the Controlled Chaos Strategy

Never attack your opponents head on. All enemies are vulnerable from their sides. There is no defense against a well-designed flanking maneuver. The boulder or arrow can go in any direction, it is geared to the actions of the enemy. What Matters is not following preordained steps but placing yourself in Shee and Giving yourself options.