A Korean naval commander, famed for his victories against the Japanese navy during the Imjin war in the Joseon Dynasty. At the end of the 16th century, Japan went through the Sengoku period and ushered in the rising period of unification. One hundred and forty thousand Japanese armies invaded Joseon. Therefore, when the Ming Dynasty sent reinforcements, the weak Joseon Dynasty was in a desperate situation. In the summer of 1597, Japan quickly succeeded in occupying large portions of the Korean Peninsula. Almost all the Joseon navy was destroyed, clearing the way for the Japanese army's all-round attack. On September 15, the Korean Joseon kingdom's navy, led by Admiral Yi Sun-sin, fought the Japanese navy in the Myeongnyang Strait. With only 13 ships remaining, Admiral Yi held the strait as a "last stand" battle against the Japanese navy of 330 fleets. In total 30 Japanese warships were sunk or crippled during the battle. The Japanese navy was forced to withdraw from the Myeongnyang Strait, and this battle was known as the Battle of Myeongnyang.