For the duration of this tumultuous time period, Goryeo momentarily conquered Liaoyang in 1356, repulsed two massive invasions through the Purple Turbans in 1359 and 1360, and defeated the final endeavor from the Yuan to dominate Goryeo when General Ch'oe Y?ng defeated a Mongol tumen in 1364. Throughout the 1380s, Goryeo turned its attention into t