Musan

Musan belongs to the mountain and river country of northeastern Korea, where upland valleys approach the Tumen frontier. Cultivation is limited by terrain and climate, so households also draw on woodland resources, hunting, animal keeping, and exchange with neighboring districts. Rivers and passes provide routes through a landscape in which winter conditions can sharply alter the ease of movement. Local knowledge helps travelers obtain supplies and cross difficult ground.

The wider frontier was shaped by relations between Korean states and Jurchen communities. In 1674 Joseon moved a military post to Sambongpyeong on the Tumen and named it Musan. It was elevated to an administrative prefecture in 1684, and a town wall was completed in 1694. The post formed part of a wider effort to govern and defend the northern frontier.