Passed the military examination and final position"s of Jeonradobyungmajeoldosa(전라도 병마절도사, 全羅道兵馬節度使). is served against the Japanese navy during the Imjin war. a Courtesy name of Subo(수보, 綏甫). In 1588, Yi passed the military examination (무과. 武科). He is famed for his victories at the Battle of Woongchi and Ahndeokwon in 1592.
He was killed on April 18, 1597 at the Siege of Namwon, aged 43.
The royal court eventually bestowed various honors upon him, including a posthumous title of Chungjanggong (충장공, 忠壯公, Loyal Duke of brave), an enrollment as a Seonmu Wonjong Gongsin (선무원종공신, 宣武原從功臣), and two posthumous offices, Jwachanseong (좌찬성, 左讚成, Left Vice Prime Minister).