In December 1359, part of the Red Turban army moved their base to the Liaodong Peninsula. However, they were experiencing a shortage of war materials and lost their withdrawal route to Chinese mainland. The Red Turban army led by Mao Ju-jing invaded Goryeo and took the city of Pyongyang. In January 1360, the Goryeo army led by An U and Yi Bang-sil retook Pyongyang and the northern region which had been captured by the enemy. Of the Red Turban army that had crossed the Yalu River, only 300 troops returned to Liaoning after the war. In November 1360, the Red Turban troops invaded again Goryeo's northwest border with 200,000 troops and they occupied Gaegyeong, the capital of Goryeo, for a short period, King Gongmin escaped to Andong. However, Generals Choe Yeong, Yi Seonggye (later Taejo of Joseon), Jeong Seun and Yi Bang-sil repulsed the Red Turban army. Sha Liu and Guan Xiansheng, who were Red Turban generals, were killed in the battles. The Goryeo army continually chased their enemy and cleared them from the Korean Peninsula.