6.14

"By my estimation, though the soldiers of Yueh were many, what was their advantage in victory? Therefore, it is said: 'Victory can be achieved.' Thus, even if the enemy is many, he can be made not to fight."
- Sun Tzu

Here Sun Tzu provides a historical reference to the soldiers of Yueh to support his argument. Yueh was a southern state in Ancient China that was the enemy of Wu, the state Sun Tzu would come to serve. Despite Yueh's superior numbers over Wu, Wu would often win the battles.

Sun Tzu's point is simply to reinforce his points before - that absolute numbers do not matter. What matters is concentrating resources towards the enemy's weak points, i.e. where the enemy is not concentrated.