Red Turban invasions of Goryeo

The Red Turban invasions of Goryeo occurred in the 14th century, when the Red Turban Army (In Korean history they are recorded as the Honggeonjeok (“Red Turban Bandits”), a peasant rebel force that arose in the Zhejiang area region against the Mongol-led Yuan dynasty. One branch of this movement advanced through northern China and Liaodong and invaded the Korean Peninsula twice, in 1359 (8th year of King Gongmin) and 1361 (10th year of King Gongmin).

Source: Wikipedia — Red Turban invasions of Goryeo (CC BY-SA 4.0)