Tây Sơn wars

Tây Sơn wars
Vietnamese Civil war of 1771–1802

Vietnam in 1792. Nguyễn lords' territories is the green area; while The yellow and the dark areas were under control of Tây Sơn leaders Nguyễn Nhạc and Nguyễn Huệ.
Date1 August 1771 – 22 July 1802 (1771-08-01 – 1802-07-22)
(30 years, 11 months, and 22 days)
Location
Result

Final Nguyễn victory

Belligerents
Tây Sơn
Cham people
Chinese Vietnamese (1771–1777)
Pirates of the South China Coast
Nguyễn lords
Kingdom of Cambodia
Siam
 France (1778–1802, limited)
Kingdom of Vientiane
Chinese Vietnamese (Hoà Nghĩa army)
Trịnh lords (1775, 1785–1786) Qing dynasty (1788–1789)
Royal Vietnamese army under Lê Chiêu Thống
Commanders and leaders
Nguyễn Nhạc #
Nguyễn Huệ #
Nguyễn Lữ #
Nguyễn Quang Toản 
Ngô Văn Sở 
Lý Tài (1771–1775)
Po Tisuntiraidapuran 
Chen Tianbao
Zheng Yi 
Nguyễn Phúc Thuần 
Nguyễn Phúc Ánh
Đỗ Thanh Nhơn 
Lê Văn Duyệt
Lý Tài  (1775–1777)
Po Ladhuanpuguh #
Rama I
Chaophraya Aphaiphubet (Baen)
Nanthasen #
Louis XVI (diplomatic only)
Pierre Pigneau de Behaine
Jean-Baptiste Chaigneau
Jean-Marie Dayot
Olivier de Puymanel
Trịnh Sâm #
Hoàng Ngũ Phúc #
Trịnh Khải 
Trịnh Bồng #
Sun Shiyi
Cen Yidong  
Lê Chiêu Thống
Strength

Tây Sơn: 25,000 (1774)
200,000 (1794-peak)


South China sea pirates: 50,000 (1802)
Nguyễn lord: 80,000 (1771)
140.000 (1802)
Siamese: 50,000
Cambodian: 20,000
France: 1,600 mercenaries
Trịnh lords: More than 150,000 (1786) China: 60,000–200,000 (1788–1789)
Casualties and losses
More than 1-2 million

The Tây Sơn wars or Tây Sơn rebellion, often known as the Vietnamese civil war of 1771–1802, were a series of military conflicts that followed the Vietnamese peasant uprising at Tây Sơn (in Central Vietnam) that were led by three brothers: Nguyễn Nhạc, Nguyễn Huệ, and Nguyễn Lữ. These revolutionary forces grew and later overthrew the ruling Vietnamese elite families and the ruling Lê dynasty. The Tây Sơn leaders installed themselves as rulers of Vietnam that held power until they were overthrown by Nguyễn Phúc Ánh, a descendant of the Nguyễn lord who was previously overthrown by the Tây Sơn. The war ended in 1802 when Nguyễn Phúc Ánh (now called Emperor Gia Long) defeated the Tây Sơn and reunited Đại Việt, then renamed the country to Vietnam.