Ōei Invasion
The Ōei Invasion (応永の外寇, Ōei no gaikō), also known as the Kihae Expedition (Korean: 기해동정; Hanja: 己亥東征; MR: Kihae tongjŏng), was a 1419 Joseon invasion of Tsushima Island, which is located in the middle of the Tsushima Strait between the Korean Peninsula and Kyushu. The third and largest suppression of Tsushima (對馬島 征伐) took place in 1419 (first year of the reign of Sejong), named after the zodiac of that year.