LAUSR

Although the Ming and Chosŏn states recognized the Yalu River (K. Amnok River) as the demarcation of their territories, this boundary was far from a static and distinct line free of controversy and rivalry. Throughout the fifteenth to seventeenth centuries, the two governments and their subjects increasingly encountered and interacted on the dotted river islands of the lower reaches of the Yalu River, a region that easily lent itself to mutual exploitation and inhabitance. This led to substantial contestations and negotiations concerning territorial security and border separation between the two states. Past scholarship has paid attention to the related historical facts, including the advancement of Ming military projects toward eastern Liaodong and the anxiety this issue brought to the Chosŏn authorities, and the fluctuant cultivation of the Yalu River islands and their disputable territorial ownership. These research results understand Ming-Chosŏn relations within an impact-response framework, regarding the latter as being