Using harmony to hunt down opposition, not attacking a blameless country, not taking captives or booty wherever the army goes, not razing the trees or polluting the wells, washing off and purifying the shrines of the towns and hills in the countryside you pass through, not repeating the mistakes of a moribund nation -- all this is called the Way and its rules. When the army is strictly disciplined, to the point where soldiers would die rather than disobey, rewards and punishments that are trustworthy and just are established -- when the military leadership is such that it can achieve this, it can prevail over an opponent's corrupt civil government.