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Yi Sun-sin (April 28, 1545 – December 16, 1598, Korean: 이순신, Hanja: 李舜臣) was a Korean naval commander noted for his victories against the Japanese navy during the Japanese invasions of Korea (1592-1598) in the Joseon Dynasty. His title of Samdo Sugun Tongjesa (Hangul : 삼도수군통제사, Hanja :三道水軍統制使), literally meaning "Naval Commander of the Three Provinces" was to remain as the title of the commander of the operating arm of the Korean navy until 1896. Yi is also known for his innovative use of the turtle ship. He is reputed to be one of the few admirals to have been victorious in every naval battle (of at least 23)[1] in which he commanded.