Yi Sun-sin (born 1554)

Yi Sun-sin (January 30, 1554 – September 11, 1611) was a Korean military official of the mid-Joseon Period. He was a general under Admiral Yi Sun-sin during the Imjin war.

Biography
Yi Sun-sin was born on January 30, 1554, in Siheung, Gyeonggi Province. In September 1577, he passed the military examination, winning the first place in archery. After serving as a Herald, he was appointed the magistrate of Gangjin in 1582. However, he was dismissed in 1585 due to friction with the powerful gentry family in Gangjin. In 1586, he became an assistant magistrate of Onsong by the recommendation of his former teacher, Kim Seong-il. In 1588, he was appointed as an assistant magistrate of Uiju and was in charge of the performance of envoys from the Ming dynasty. The envoy of the Ming dynasty demanded a bribe, but Yi refused, and when the envoy of the Ming dynasty tried to report him, he resigned his post. He was appointed as Associate Commander of Hyesan due to the increased invasion of the Jurchens in the north but was unable to defeat them because of his disease. In 1591, he was appointed as Associate Commander of Bangdap and prepared to fight against the Japanese by rearranging military officers, repairing their fortresses and weapons.

Upon the outbreak of the Imjin war, Yi served as a Central Commandant in the Admiral Yi’s first campaign. Since then, he had always been at the vanguard as Front Commandant. He led the vanguard and lured the Japanese troops. After the Battle of Hansando Admiral Yi Sun-sin, who felt sorry that his contribution was not recognized, suggested to the government his promotion and he was eventually promoted to Jeolchung, third senior rank and appointed the Naval Commander of Chungcheong Province. However, he was dismissed due to the strict application of the penal code and demoted to the Associate Commander of Goryang. In 1597, when the Japanese second invasion broke out, he was appointed as the Naval Commander of Right Gyeongsang Province to replace Bae Seol who fled from the Battle of Chilcheollyang. Later, he served as a Central Commandant again under Admiral Yi Sun-sin. When Yi Sun-sin was killed by enemy bullets in the Battle of Noryang, he commanded Joseon's naval forces.

After the Japanese Invasion of Korea, Chen Lin, a general of the Ming dynasty, recommended Yi as the Naval Generalissimo of the Three Provinces, and although the Border Defense Council agreed, Censorate  opposed it. In January 1599, he resigned from his position as a Naval Commander and was appointed to the Police Chief, but was dismissed for killing an innocent person. Since then, he had repeatedly been promoted to various government posts and dismissed from his post. In 1604, he was appointed the Fifth Minister (of the Office of Ministers-without-Portfolio) and listed as the third rank of Seonmu Merit Subjects  in recognition of his contribution during the Japanese Invasion of Korea in and given the title of Wansangun. He was retitled as Wancheongun the following year after serving as the magistrate of Suwon in 1606. In 1608, when King Seonjo died and Gwanghaegun was crowned, Yi was also questioned for his involvement in the death of Imhaegun. In 1610, he was appointed as Army Commander of Jeolla Province but died on September 11, 1611.

In popular culture

 * Portrayed by Jeon Hyun in the 2004–2005 KBS1 TV series Immortal Admiral Yi Sun-sin.