We had a hero for a long time ago. He was a general and lived in Cho-Sun when Japan invade us. He defeated them whenever he was on battle with his battleship and army. Even he made 거북선(turtle-ship) to prepare their invasion. Even he defeated 133 enemy's battleships with just 13.
You can see him at the 광화문 street.
I respect him so much.
read more here https://en.wikipedia.org/wiki/Yi_Sun-sin