여진
Under Joseon period Kyongwon was invaded by Jurchens tribes in 1409. Therefore, to safeguard his people from the hostile Chinese and Jurchen people (later known as Manchus) living in Manchuria, King Sejong the Great of Joseon ordered to establish there one of the six post/garrisons (hangul :육진 hanja :六鎭) in 1433. In 1977 the county's name was changed to Saebyol, but it was later reverted.