Choe Yeong
In 1368, when the new Ming dynasty of China offered an alliance against the Mongols, King Gongmin of Goryeo ordered Choe Yeong to invade the remaining Mongol garrisons in Manchuria. Choe Yeong maneuvered north of the Yalu River and captured and the city of Liaoyang in 1370, but this did not lead to a permanent settlement.