Imjin War (Korean Perspective)

What happened

Toyotomi Hideyoshi, Japan's unifier, invaded Korea (1592-1598) with 158,000 troops as a stepping stone to conquer China. The Japanese expeditionary force, led by generals Kato Kiyomasa and Konishi Yukinaga, rapidly conquered Korea despite fierce resistance from Korean forces and Ming Chinese intervention. Korean General Yi Sun-sin conducted devastating naval campaigns using the geobukseon (turtle ship), sinking Japanese supply ships and disrupting logistics. The Korean resistance, though ultimately unsuccessful militarily, prevented Japanese consolidation of territory. Chinese Ming forces invaded Korea to support the Korean king; the combined Chinese-Korean forces gradually pushed the Japanese out by 1598. The war devastated Korea: famine, disease, and destruction of infrastructure killed over 1 million people.

Why it mattered

The Imjin War demonstrated Japanese military capability and Hideyoshi's expansionist ambitions, which ended with his death in 1598. The war devastated Korea economically and militarily, weakening the Joseon Dynasty. Korean resistance—particularly Yi Sun-sin's naval victories—influenced subsequent Korean military tradition. The war demonstrated the effectiveness of the geobukseon and influenced ship design in East Asia. The conflict reinforced Korean-Chinese alliance against Japanese expansion.