– August 12, 1467) was a Korean Joseon Dynasty politician and soldier who led a rebellion against King Sejo for his centralization policy in the northern provinces.
Taejo established this area as his base of power, subjugating the Jurchen tribes and increasing his strength.
However, in a situation where they always had to face off against the Jurchen raids, it was necessary to make enormous human and material sacrifices to defend Hamgildo, which put a tremendous burden on the people of Hamgil province.
As a result of regional discrimination against Hamgyeong residents, the people protested against appointed officials from abroad and local councils (향청; 鄕廳; Hyangcheong) in Hamgyeong unified their forces against the central government with Yi Si-ae and his family leading them.
[2][3] They won the battles in Bukcheong and Manryeong and forced Yi Si-ae to retreat to Kilju.