I read the history of the Japanese Invasion of Korea in 1592.

 Before Imran, Joseon always maintained a navy of 50,000 people as a standing army. It is said that there were about 600 large and small fronts during the reign of King Taejong and 850 during the reign of King Seongjong. It is said that Japan is made up of Japanese pirates, and about 10,000 troops were organized into the navy just before the Japanese invasion. Initially, the Japanese navy was intended to transport the army, but it had no concept of naval warfare. According to the naval battle in the Warring States Period, the back-and-forth tactics were the center, so all you had to do was get on the other side's boat and fight and win. When Morrie and Oda's pirates fight, Moriga's family wins by burning the opponent's ship, and Oda's family wins by loading two to three cannons into Adake. At that time, hundreds of Mori's ships were overpowered with six Adake. When he won, he was satisfied that there was no concept of controlling the sea power and that he secured a safe transportation passage through a naval victory. According to Injo Japan, it is said that the Japanese children sent the Myeongnyang Naval Battle transport ship was broken, but I think it is fully understood why they said so in the first place that they did not have a concept of naval warfare while living in the sea. Four years before Imran, there was an incident in which a left-handed warrior in Jeolla Province was killed while fighting against Japanese pirates with 18 ships. For the next three years, the newly appointed Jwasuji was said to have had some problems dealing with the military discipline of the barracks. When Admiral Yi Sun-shin took office, I think Jwasuyeong had better military and combat experience than other forces. The naval battles, which began with Okpo in the early days of Imran, also landed on the coast of the Japanese enemy, secured a bridgehead, and plundered it, so it doesn't matter from their point of view whether the ship breaks or what happens. After the Battle of Hansando, Japan studied ways to fight the Joseon Navy. Lee Gan-gye to drive out Yi Sun-shin also succeeded, approached the Joseon Navy, ambushed and killed the fleeing enemy by ambush on a nearby island. Before the Battle of Chilcheonryang, Wongyun led the Samdo Navy to fight the enemy several times and retreat. From this point on, the Joseon Navy suffers from fatigue and famine, and when it lands on a nearby island, troops who went out to rescue water are exterminated by the attack of Japanese soldiers hidden in advance. So I forced myself to anchor at Chilcheonryang Port, but the Japanese invaders carried out a night attack. When three or four Japanese ships looked around between the Joseon fleet and no one noticed, Japanese ships waiting outside clung two to three ships to the Joseon ships at once and raided them. The Joseon Navy, which had already fallen with fatigue and gigal, must have fallen with autumn leaves. The nearby islands are also ambushed by Japanese soldiers, so even if they ran away, they would have been exterminated. The excrement and others who escaped at this time are really blessed people. It is said that 133 enemy ships were seen by Admiral Yi Sun-shin in Myeongnyang Naval Battle, and 300 enemy ships were seen by refugees on the mountain. Because the strait was narrow, Akeda could not enter, and the Sekibune attacked mainly. Line 1 summary 1. The Japanese enemy had no concept of naval warfare and was intended to transport troops. 2. Japan also conspired to destroy the Joseon naval forces.