The Tây Sơn Rebellion was a massive peasant rebellion and an interregnum in the late eighteenth century Dai Viet (present-day Vietnam) against the ruling Vietnamese elites and monarchs, during the context of a 250-year-long disintegration period. The rebellion was led by three Tayson brothers, Nguyễn Nhạc, Nguyễn Huệ, and Nguyễn Lữ, who eventually overthrew all ruling clans and the reigning Lê dynasty in southern and northern Dai Viet.