Emperor Quang Trung or Nguyễn Huệ, also known as Nguyễn Quang Bình, was the second emperor of the Tây Sơn dynasty, reigning from 1788 until 1792. He was also one of the most successful military commanders in Vietnam's history. Nguyễn Huệ and his brothers, Nguyễn Nhạc and Nguyễn Lữ, together known as the Tây Sơn brothers, were the leaders of the Tây Sơn rebellion. As rebels, they conquered Vietnam, overthrowing the imperial Later Lê dynasty and the two rival feudal houses of the Nguyễn in the south and the Trịnh in the north.

The Trịnh lords, formally titled as “Prince” of Trịnh, also known as the House of Trịnh or the Trịnh clan, were a feudal nobility clan that ruled Northern Vietnam, during the Later Lê dynasty.