This is what you’re looking for. In fact, The Book of Five Rings is often placed alongside The Art of War by Sun Tzu, On War by General Carl von Clau… - Miyamoto Musashi

You cannot profit from small techniques particularly when full armor is worn. My Way of strategy is the sure method to win when fighting for your life one man against five or ten.

Many things can cause a loss of balance. One cause is danger, another is hardship, and another is surprise. You must research this. In large-scale strategy it is important to cause loss of balance. Attack without warning where the enemy is not expecting it, and while his spirit is undecided follow up your advantage and, having the lead, defeat him.

When we are fighting with the enemy, even when it can be seen that we can win on the surface with the benefit of the Way, if his spirit is not extinguished, he may be beaten superficially yet undefeated in spirit deep inside. With this principle of "penetrating the depths" we can destroy the enemy's spirit in its depths, demoralizing him by quickly changing our spirit. This often occurs. Penetrating the depths means penetrating with the long sword, penetrating with the body, and penetrating with the spirit. This cannot be understood in a generalization. Once we have crushed the enemy in the depths, there is no need to remain spirited. But otherwise we must remain spirited. If the enemy remains spirited it is difficult to crush him.