Korean War of 1592-1598

The Japanese invasions of Korea (1592-1598) comprised a major war between Japan and the alliance of Ming of China and Joseon of Korea. Japan invaded Korea on May 23, with the larger objective to conquer the entirety of Asia by using Korea as a land bridge to China. The battles that involved 300,000 combatants and claimed more than 2 million lives took place almost entirely on the Korean peninsula and its nearby waters. The war consisted of two main invasions from Japan – the first in 1592 and 1593, and the second from 1597 to 1598.

Toyotomi Hideyoshi, the predominant warlord in Japan, had for long been aspiring to leave his name in history as a great conqueror of Asia. Even before unifying all of Japan in 1590, Hideyoshi began sending ambassadorial missions in 1587 to Korea to reveal his intention to have Korea join with Japan on war against China. Hideyoshi had been under the false impression that Korea was a Japanese territory as a part of the Tsushima Island, when in fact Korea was a vassal state of China. When Korea rejected Hideyoshi's "decree" in 1592, Hideyoshi launched the invasion late in April and commanded his forces in absentia.

The Japanese troops first attacked the southeastern part of Korea and then advanced northwestward to the capital. The Korean capital city of Hanseong fell within 3 weeks and most of the peninsula came into Japanese control by end of the year. China responded by sending 3,000 troops to the city of Pyeongyang in late August, but the Chinese were horribly outnumbered and defeated by the Japanese troops. However, within a few days of the Chinese defeat, the Korean admiral Yi Sun-sin annihilated the Japanese fleet carrying the reserve troops that would continue the invasion into China. On January 1, 1593, the Chinese launched a counter-offensive with 50,000 troops and reclaimed Hanseong by the middle of May. With the southeastern parts of the peninsula in Japanese hands, the two sides spent several years in diplomatic talks. The Japanese officials justified their invasion by asserting that Korea carried out policies to prevent Japan from entering the Chinese tributary system. Consequently the Chinese diplomats went to Japan and invested Hideyoshi, whose subordinates misled him into believing that the Chinese had come to surrender in person. The peace negotiations culminated in October of 1597 in another invasion by the Japanese troops when Hideyoshi found out the truth behind the Chinese visit. The Japanese saw very little success and, as ordered by Hideyoshi, began to withdraw late in 1598. The war ended middle in December with the naval battle at the straits of Noryang, where the Korean and the Chinese fleets sunk over 300 Japanese ships carrying as many as 10,000 lives.

The war is known by several English titles, including the Hideyoshi's invasions of Korea, in context of Hideyoshi’s biography; the Seven Year War, in reference to the war’s duration (the fighting continued even during the peace negotiations); and the Imjin War, in reference to the first year of the war in Korean (See Sexagenery Cycle).

Background

East Asia and the Chinese Tributary System

The war took place within the context of the Chinese tributary system that dominated the East Asian geopolitics. In practice, the tributary states periodically sent ambassadors to the Chinese imperial court to pay homage and to exchange gifts, while maintaining complete autonomy. Many of the tributary states received from China the rights toward the international trade within the tributary system. The theoretical justification for the tributary system was the doctrine of the Mandate of Heaven, that the Heaven granted the Chinese Emperor the exclusive right to rule, with the purpose of benefiting the entirety of mankind. Several Asian countries, including Korea, voluntarily joined the tributary system in pursuit of the legal tally trade and the legitimacy in their rule through the doctrine of the Mandate of Heaven.

Japan actively sought to engage in the tributary trade and attained from China the two treaties, in 1404 and in 1434, that admitted Japan into the market system and required Japan to police its waters against the wako pirates. While the modern Japanese historians argue that Japan never "officially" submitted to the tributary system, China considered trade as a form of tribute from Japan and regarded Japan to be within its area of influence. However, as the Japanese lords failed to effectively control its piracy, China expelled Japan from the tributary system in 1547. The trade issue would emerge again, during the wartime negotiations between Japan and China, as a cautious excuse from the Japanese to justify their first invasion of Korea.

China came to Korea's aid during the war mainly because of Korea's symbolic importance to the Chinese. The Chinese and Koreans considered themselves as the pinnacles of civilization, similarly to today's cross-national cultural identities (such as "the West") based on scientific and academic achievements. The very strict Confucian ideologies that imbued the two countries contributed to this elitism by rejecting the foreign customs and learnings as immoral and barbaric. Additionally, China aimed to protect the legitimacy of its tributary system by fulfilling its promise to provide security to its tributary states. The Chinese authorities feared greatly that the China's loss of legitimacy on this occasion would spur a domino effect of opposition, collapsing the entire tributary system. If not, still the loss of Korea to Japan meant that China could no longer outflank the northern region of Manchuria, in its war against the hostile Jurchen tribes.

Military situation

The conflict was one of the earliest cases of modern warfare, characterized by the mass deployment of troops, concentrated fire of the artillery and firearms, and the constant tactical and technological adaptations by the two sides, such as the Turtle Ship, possibly the first iron-clad warship.

Bibliography

• Berry, Mary Elizabeth. Hideyoshi (1982), the standard biography
• Kuno, Yoshi S. Japanese Expansion on the Asiatic Continent, (2 vols. 1937-40),
• Swope, Kenneth M. "Crouching Tigers, Secret Weapons: Military Technology Employed During the Sino-Japanese-korean War, 1592-1598." Journal of Military History 2005 69(1): 11-41. Issn: 0899-3718 Fulltext: Project Muse
• Swope, Kenneth M. "Rhetoric, Disguise, and Dependence: China, Japan, and the Future of the Tributary System, 1592-1596," International History Review 24, no. 4 (December 2002): 757-82.
• Swope, Kenneth M. "Turning the Tide: the Strategic and Psychological Significance of the Liberation of Pyongyang in 1593." War & Society 2003 21(2): 1-22. Issn: 0729-2473
• Turnbull, Stephen. Samurai Invasion: Japan's Korean War, 1592-1598 (2002). 256pp
• Turnbull, Stephen and Richard Hook. Samurai Armies 1550-1615 (1979) excerpt and text search
• Yu Sŏngnyong. The Book of Corrections: Reflections on the National Crisis During the Japanese Invasion of Korea, 1592-1598, trans. Choi Byonghyon (2002). The book is known in Korean as the Chingbirok.

---