The area around the island was the site of the Battle of Hansan Island during the Imjin War where Admiral Yi Sun-Sin decisively defeated the main Japanese war fleet led by Wakizaka Yasuharu. Following the battle, Admiral Yi moved his main naval base from Yeosu to Hansan Island, as it was strategically advantageous for conducting surveillance and reconnaissance of the nearby Gyeonnaeryang Strait , which was an inland route leading directly to the main Japanese base located at Busan. After King Seonjo ordered Admiral Yi Sun-Sin's arrest, imprisonment, and torture Admiral Won Gyun was assigned to lead the Korean navy. However, Won Gyun attacked the Japanese base at Busan, ignoring the tides, and was forced to retreat owing to shelling from the shore. The Japanese navy pursued him relentlessly and sank all but thirteen of the Panokseon in the process. Won Gyun was killed during this disastrous retreat, and Hansan Island, and its evacuated naval base, was exposed to the Japanese forces, who eventually burned it down. After the war, Joseon naval base was reconstructed, Yi was rehabilitated, and went on to defeat the Japanese with the remaining 13 Panokseon.
Battle of Hansando
Yi's army, which has been in the second round since May 29, 1592, heard of Sacheon pier, Dangpo, and Danghampo Then the enemy ships started to rise again in the small seas, and came to the army from 10 to 30 ships near Gadeok Island and Geoje Island. Upon hearing of the report, Yi Sun-sin of Jeolla-gu contacted Yi Hwang-gil and decided to move again. At this time, Japan increased its forces to make up for its defeat in the sea. The first group of Wakisaka Yasuharu, with more than 70 ships, was deployed in Woongcheon and Yoshitaka Kuki, the 40th. On July 6, Yi departed from Yeonsuyeong with 49 ships and sailed at Noryang. When the Joseon fleet arrived at Dangpo on the site of the ancient castle on Wednesday evening, some 70 enemy ships, Chinese and Chinese, were informed that they had entered the North Korean naval vessel, and the day after, the operation was advantageous. Hansando Island is located between Geoje Island and Goseung, so it was a perfect place to starve to death even if the enemy were forced to land in a corner. Thus, five or six ships of Panjeok Ship followed the enemy's lead, and the enemy ship made a false retreat. When we reached the shore of Hansando as scheduled, all of the ships temporarily drove around, blowing their whistle and advancing toward Haksang. As many as 66 ships, including the Jijabon, the wise president, and the winner, were fired at the same time. Hundreds of people had been killed in grade 86 or other drowning or stabbing, and about 400 who fled to the island of Hansan had to flee for 13 days. This fight was one of the three battles during the Japanese Invasion of Korea.
