Gwanghae-gun or Prince Gwanghae (4 June 1575 – 7 August 1641), personal name Yi Hon (Hangul: 이혼, Hanja: 李琿), was the 15th ruler of the Joseon Dynasty of Korea. As he was deposed in a coup d'état, he did not receive a temple name.
Biography
Birth and background
Gwanghaegun was the second son of King Seonjo, born to Lady Kim Gong-Bin, a concubine. When Japan invaded Korea to attack the Ming Empire, he was installed as Crown Prince. When the king fled north to the border of Ming, he set up a branch court and fought defensive battles. During and after the Seven Year War (1592–1598), he acted as the de facto ruler of the Joseon Dynasty, commanding battles and taking care of the reconstruction of the nation after the devastating wars, in the place of old and weak King Seonjo.
Although it brought prestige to him, his position was still unstable. He had an elder but incompetent brother Prince Imhae (Imhaegun, 임해군, 臨海君) and a younger but legitimate brother Grand Prince Yeongchang (Yeongchang Daegun, 영창대군, 永昌大君), who was supported by the Lesser Northerners faction. Fortunately for Gwanghae, King Seonjo's abrupt death made it impossible for his favorite son Yeongchang to succeed to the throne.
Violence of Greater Northerner faction
Before King Seonjo died, he named Prince Gwanghae as his official successor to the throne and ordered his advisers to make a royal document. However, Lyu Young-gyong of the Lesser Northerners faction hid the document and plotted to install Grand Prince Yeongchang as king, only to be found out by the head of the Great Northerners faction (대북; 大北), Jeong In-hong. Lyu was executed immediately and Grand Prince Yeongchang was arrested and executed the following year.
After the incident, Gwanghae tried to bring officials from various political and regional background to his court, but his plan was interrupted by Greater Northerners including Yi I-cheom and Jeong In-hong. Then, Greater Northerners began to take members of other political factions out of the government, especially Lesser Northerners. In 1613, the Greater Northerners moved against Grand Prince Yeongchang; his grandfather Kim Je-nam was found guilty of treason and executed, while Yeongchang was sent into exile, where he too was executed. At the same time, Greater Northerners suppressed the Lesser Northerners; in 1618, Yeongchang's mother, Queen Inmok, was stripped of her title and imprisoned. Gwanghae had no power to stop this even though he was the official head of the government.
Achievements
Despite his poor reputation after his death, he was a talented and pragmatic politician. He endeavored to restore the country and sponsored the restoration of documents. As a part of reconstruction, he revised land ordinance and redistributed land to the people; he also ordered the rebuilding of Changdeok Palace along with several other palaces. Additionally, he was responsible for the reintroduction of the hopae identification system after a long period of disuse.
In foreign affairs he sought a balance between the Ming Empire and the Manchus. Since he realized Joseon was unable to compete with Manchu military power, he tried to maintain friendly relationship with the Manchus while the kingdom was still under the suzerainty of Ming, which angered the Ming and dogmatic Confucian Koreans. The critically worsened Manchu-Ming relationship forced him to send ten thousand soldiers to aid Ming in 1619. However, the Battle of Sarhū ended in Manchu's overwhelming victory. The Korean General Gang Hong-rip lost two-thirds of his troops and surrendered to Nurhaci. Gwanghaegun negotiated independently for peace with the Manchus and managed to avoid another war. He also restored diplomatic relationship with Japan in 1609 when he reopened trade with Japan through Treaty of Giyu, and sent his ambassadors to Japan in 1617.
In the domestic sphere, Gwanghaegun implemented the Daedong law, which let his subjects pay their taxes more easily. However, this law was activated only in Gyeonggi Province, which was the largest granary zone at that time, and it took a century for the law to be extended across the whole kingdom. He encouraged publishing in order to accelerate reconstruction and to restore the kingdom's former prosperity. Many books were written during his reign, including the medical book Dongui Bogam, and several historical records were rewritten in this period. In 1616, tobacco was first introduced to Korea and it soon became popular amongst the Korean aristocracy.