The full effect

of this trend would not be felt until 1592
when Japanese forces launched a massive attack against China,
using the Korean peninsula, known then as Chosun, as a stepping
stone in the process. Essentially defenseless, the population
managed not only to survive, but triumph by drawing on the
talents of guerrilla units that had been secretly trained in the
martial arts at monasteries and estates throughout the region.
Out of this conflict came the heroic Admiral Yi, a strategist of
unsurpassed proportions whose radical approach to naval warfare
Taekwondo—Ancient Wisdom for the Modern Warrior