king munjong (1414–1452), the fifth king of the joseon dynasty, succeeded king sejong in 1450 as the first son of him. however, two years later because of disease he died and was followed by his young son king danjong. king danjong ascend the thrown at the age of 12 and was forced to abdicate by his uncle, grand prince suyang who became sejo of joseon, and exiled to yeongwol county. sejo produced a coup d'état and became the seventh king himself in 1455