Sun Tzu's nine rules for adapting responses by comparing the strength of forces.
Playbook Articles are available only to members, but you can purchase article downloads.
This article explains that when we meet opposition, we also have to consider our relative strength versus our opponent's. Strength comes internally from our mission and externally from how well our mission fits a given position. Position strength is a very different strategic concept from size of forces, but it relates directly to our shared dedication to a mission.