Yi Sun-sin was a Korean admiral and military general known for his victories against the Japanese navy during the Imjin War in the Joseon period. Yi's courtesy name was Yŏhae, and he was posthumously
Modern bust depicting Yi
Drawing of a 16th-century turtle ship
In early 1597, Yi Wŏnik, then a high-ranking government official, submitted a formal petition opposing the dismissal of Admiral Yi during the Imjin War. In the previous year, the royal court had repeatedly discussed removing Yi Sun-sin from command and replacing him with Wŏn Kyun. Yi Wŏnik argued that Yi Sun-sin was the most capable leader for the navy and that Wŏn Kyun was unsuitable to lead.
Yi Sun-sin Janggeom (이순신 장검; 李舜臣 長劍)
A turtle ship was a type of warship that was used by the Korean Joseon Navy from the early 15th century up until the 19th century. They were used alongside the panokseon warships in the fight against
Yi Sun-sin
…confront the Japanese invasion force. He subsequently began to strengthen the province's navy with a series of reforms, including the construction of the turtle ship. Yi is remembered for his numerous victories fighting the Japanese during the Japanese invasions of Korea (1592–1598), also referred to as the Imjin…
Model of a turtle ship in the War Memorial of Korea
Depiction of 1795 ship considered to resemble Yi's 1592 version.
Estimation of the early 15th century turtle ship according to an illustration from 1795
Three large Chongtong at the Jinju Fortress museum. The closest is a cheonja-chongtong, the second is a jija-chongtong, and the third is a hyeonja-chongtong.