Phạm Sư Ôn's rebellion

In the first month of 1390 the monk Phạm Sư Ôn raised the peasants of Quốc Oai, marched on Thăng Long and held it for three days while the court fled to Bắc Giang, until the general Hoàng Thế Phương came back from the Cham front and crushed the rising.