Gim Si-min

Gim Si-min (1554–1592), also known as Kim Si-min, was a prominent Korean general during the Joseon Dynasty. He is most famous for having defended Jinju Castle against the Japanese invaders during the Seven Years' War.

Background
Gim Si-min was born in Chungcheong Province in 1554, the son of Gim Chung-gap. Historically, he is the 12th generation descendant of the Goryeo Dynasty general Gim Bang-gyeong.

Government
In 1578, Gim passed the government military examination and was appointed as a training official. When he inspected the available weaponry and soldiers, he found that none were satisfactory for proper training. Thus he went to see the Minister of War concerning the fact that the nation would be under peril if a sudden crisis occurred and the national soldiers were not ready. However, the Minister replied that no such crisis can occur in such a peaceful time and that a strong military could frighten the peasants and therefore rejected Gim’s proposition of a well prepared military.

Gim continued to plead to the Minister but as he was constantly rejected, he removed his military clothing in front of the minister, stepped on them and left the room. In 1583, when Nitangjie (니탕개, 尼湯介), the Jurchen defect rebelled against the Joseon government in Hoeryeong, Gim rejoined the armed forces under General Jeong Eon-sin. As the second-in-command, he earned great merit in defeating the Jurchens.

Japanese Invasions and Siege of Jinju
Gim was made an official in Jinju Castle in 1591, and with the sudden death of the castle’s guardian Yi Gyeong, and the beginning of the Imjin Wars he came to be the commander of the fortress. From there, he acted decisively to fortify the castle.

During the Wars, he defeated Japanese forces at Sacheon and Goseong and captured the Japanese commander Pyeongsotae at Jinhae. With this merit he was appointed Right Gyeongsang provincial army district Commander (경상우도병마절도사) and once again defeated the Japanese at Geumsan.

The Japanese general Ukita Hideie and Hosokawa Tadaoki agreed on taking Jinju castle because if the Japanese captured it, it would open up a new road to Jeolla, and they would be able to attack Gwak Jae-u's guerilla forces hiding in the area. Jeolla was also place for plenty of loot. Ukita also agreed to recapture Changwon, a small fortress that led to Jinju castle. Therefore, an army of 20,000 men to recapture Changwon and Jinju set out.

The Japanese heartily approached Jinju castle. They expected another easy victory at Jinju but Gim defied the Japanese and stood firm with his 3,800 men. Again, the Koreans were outnumbered. Gim had recently acquired around 170 arquebuses, equivalent to what the Japanese used. He had his men trained with this new equipment and believed he could defend Jinju.

The Japanese charged and began to bring ladders to scale the wall. They also brought a siege tower to try to gain the higher ground. As a counter, the Koreans unleashed massive volleys of cannons, arrows, and bullets. Surprised, Hosokawa tried another angle of approach by using his arquebuses to cover the soldiers scaling the wall. This still had no success because the Koreans ignored the bullets and smashed ladders with rocks and axes. When the Koreans began to lob mortars down at the Japanese, the Japanese began to lose even more men.

After three days of fighting, Gim was hit by a bullet on the side of his head and fell, unable to command his forces. The Japanese commanders then pressed even harder on the Koreans to dishearten them. But the Koreans fought on. The Japanese soldiers were still unable to scale the walls even with heavy fire from arquebuses. The Koreans were not in a good position since Gim Si-min was wounded and the garrison was now running low on ammunition.

However, Gwak Jae-u one of the main leaders of the irregular armies of Korea arrived at night with an extremely small band, not enough to relieve the Koreans at Jinju. Gwak ordered his men to grab attention by blowing on horns and making noises. About 3,000 guerrillas and irregular forces arrived at the scene. At this time, the Japanese commanders realized their danger and were forced to abandon the siege and retreated. The irregular army was too small to relieve Jinju. But, the retreat of Japanese soldiers heartened the Koreans and the biggest thing earned from the siege was that the Korean morale was boosted greatly.

Death
The Japanese general Ukita Hideie and Hosokawa Tadaoki commanding twenty-thousand troops, surrounded and besieged Jinju Castle. For seven days and nights, the 3800 Koreans defending the castle repeatedly repelled and defeated the Japanese, but Gim was killed in action from an arquebus round to the head.

In 1604, Gim was awarded the posthumous title Sangrakgun (상락군, 上洛君).

Popular culture
The Admiral Yi campaign of the video game Empires: Dawn of the Modern World portrays Gim as a close confidant of Yi Sun-sin. The game presents a minor alternate history in which Gim is successful in his defense of Jinju and lives to see the rest of the war. In the game, he is present at the siege of Suncheon castle and, along with Ryu Seong-ryong and Li Rusong, leads the combined Korean-Ming army to victory, killing Konishi Yukinaga at the same moment as Yi Sun-sin wins the battle of Noryang. This is a further departure from history; the siege of Suncheon ended in failure for the Korean-Ming army, neither Gim, Ryu nor Li were present, and Konishi survived the battle. Further, the siege did not occur concurrently with the battle of Noryang, but rather took place two months prior.