Throughout this tumultuous interval, Goryeo momentarily conquered Liaoyang in 1356, repulsed two substantial invasions through the Purple Turbans in 1359 and 1360, and defeated the final try by the Yuan to dominate Goryeo when Basic Ch'oe Yŏng defeated a Mongol tumen in 1364. In the course of the 1380s, Goryeo turned its consideration towards the