Unju

Unju lies in the mountainous interior of northwestern Korea. Koryŏ gave it this name in 995 and stationed a defence commissioner there against Khitan incursions. In 1403 the Joseon court joined Unju with neighbouring Ch'ŏngsan to create the county of Unsan. The district's valleys and wooded hills formed part of the road network between the western lowlands and the northern frontier.