Heoryeong

Hoeryong stood in the Tumen frontier country where Jurchen communities had maintained close relations with the early Joseon court. In 1434 King Sejong established a garrison in the Almuha area, formerly a Jurchen base, and soon raised it to a protectorate. Kim Jong-seo directed the wider northern expansion.

Hoeryong became one of the Six Garrisons through which Joseon consolidated its northeastern frontier. The neighbouring jurisdictions were not all created at once: additional posts gradually completed the defensive system, with Puryong established in 1449 behind the forward line. The district's fifteenth-century history thus involved the conversion of a contested Jurchen frontier into a chain of Korean military and civil jurisdictions, linking fortified settlements along the Tumen and their hinterland.