Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
북벌은 조선 시대의 중요한 군사 작전 중 하나였다.Bukbeol-eun Joseon sidae-ui jungyohan gunsa jakjeon jung hanada.The Northern Expedition was one of the important military operations of the Joseon era.