《吴子·料敌》
打它的方法，必须把我军区分为三部，各以一部侧击其左右两翼，另以一部乘势从正面进攻，它的阵势就可以攻破了。
击此之道，必三分之，猎其左右，胁而从之，其陈可坏。
The way to defeat it is to divide our army into three parts, each of which will flank its left and right wings, and the other will take advantage of the attack from the front, and its position can be broken.