Vietnamese Civil War of 1789–1802

The Vietnamese Civil War of 1787–1802, or the Tây Sơn–Nguyễn Civil War of 1787–1802, was a conflict fought between two Vietnamese factions, the Tayson in the north, and the Nguyen loyalists in the south, both intended to unify the realm. Following the Tây Sơn rebellion (1771–1789), the kingdom of Dai Viet was partitioned into three regions ruled by the Tây Sơn brothers Nguyen Nhac, Nguyen Hue and Nguyen Lu. Nguyen Phuc Anh, last of the slaughtered Nguyen lord family that had been overthrown by the Tây Sơn in the 1770s, returned to Vietnam in 1787 after spending years of exile in Siam to rally support for his fight against the Tây Sơn. Nguyen Anh and his allies effectively defeated the Tây Sơn, dismantled the Tây Sơn regime, reunited the country, and established a unified Vietnamese state in 1802.