The Ming Empire took control of Liaoning in 1371, just three years after the expulsion of the Mongols from Beijing. Around 1442, a defense wall was constructed to defend the agricultural heartland of the province from a potential threat from the Jurchen-Mongol Oriyanghan (who were Ming's tributaries) from the northwest. Between 1467 and 1468, the wall was expanded to protect the region from the northeast as well, against attacks from Jianzhou Jurchens (who were later to become known as the Manchu people). Although similar in purpose to the Great Wall of China, this "Liaodong Wall" was of a lower-cost design. While stones and tiles were used in some parts, most of the wall was in fact simply an earth dike with moats on both sides.
the ming empire took control of liaoning in 1371 just three years after the expulsion of the mongols from beijing around 1442 a defense wall was constructed to defend the agricultural heartland of the province from a potential threat from the jurchen-mongol oriyanghan (who were ming's tributaries) from the northwest between 1467 and 1468 the wall was expanded to protect the region from the northeast as well against attacks from jianzhou jurchens (who were later to become known as the manchu people) although similar in purpose to the great wall of china this "liaodong wall" was of a lower-cost design while stones and tiles were used in some parts most of the wall was in fact simply an earth dike with moats on both sides