Thuận Châu

Thuận Châu lies in the mountain country of northwestern Vietnam and was known locally as Mường Muổi. Its Tai communities lived in valleys between the Black and Mã rivers, under local chiefs. During Lê Lợi's campaign against the upland lord Đèo Cát Hãn, the ruler of Mường Muổi joined his opposition; local accounts relate that some of its people were subsequently moved to Thanh Hóa and Nghệ An.