The name of Tây Sơn is used in various ways to refer to the period of peasant rebellions and decentralized dynasties established between the end of the figurehead Later Lê dynasty and beginning of the Nguyễn dynasties in the history of Vietnam between 1770 and 1802. Some academics refer to this period as the "Tây Sơn uprising." The name is used to refer to the leaders of this revolt (the Tây Sơn brothers), their uprising (the Tây Sơn Uprising) or their rule (the Tây Sơn Dynasty or Nguyễn Tây Sơn Dynasty).