When Japan announces that they will soon be sending another hundred thousand troops to Chosun, Yi Aukki and Yi Soon-shin conclude the Japanese will take the sea route instead of the land route and agree to focus their efforts on defending Cholla Province. Won Kyun does not attend the alliance navy leaders meeting self-conscious of the fact that he only has 3 warships compared to the 20 ships that the Left and Right Cholla navies each have, and focuses his efforts on restoring the ships that he intentionally sunk in the beginning of the war. Wakizaka Yasuharu begins to plan a new strategy in Pusan with the cannons he seized from a Chosunese military base. Learning that the Japanese now have cannons, Soon-shin begins training his men with superior weapons with greater range and fire power.
—https://www.yidio.com/show/the-immortal-yi-soon-shin