Admiral Yi Sun-sin died 426 years ago today, in his final victory against the Japanese on behalf of the Joseon dynasty. He died of a gunshot wound at the Battle of Noryang on December 16, 1598, the closing battle of the Imjin War.

While the Japanese largely triumphed on shore in their twin invasions of Korea, Admiral Yi, in command of the Korean navy, cut Japanese supply lines and denied them access to the Yellow Sea. He wrote, “No invader from the sea can obtain final victory unless he can completely control the sea.” Despite winning nearly every land battle, the inability to supply their troops meant the Japanese invasion was doomed to fail.

Admiral Yi fought in at least 23 recorded naval engagements against the Japanese. In most of these battles, he was outnumbered and lacked the necessary supplies. He nonetheless won battle after battle. His most famous victory occurred at the Battle of Myeongnyang, where despite being outnumbered by 133 warships to 13, he managed to disable or destroy 31 Japanese warships without losing a single ship of his own. Indeed, Yi is credited with sinking over 780 Japanese ships during the war without losing a single ship under his command. In 14 of these 23 battles, not a single Japanese ship survived. Remarkably, when Yi took command of the Korean Navy, he had no formal naval training of any kind.

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