ÃÂá» Thanh Nhán (died 1781) was an 18th-century Vietnamese military commander.
Details of Nhán's early life are unknown except that he was a low-ranking naval officer of lord Nguyá» n Phúc Thuần.
In the early 1770s, the Tây Sán revolt broke out and quickly occupied a large part of the Nguyá» n Lordsâ territory, in the southern half of modern-day Vietnam. Moreover, the Trá»Ânh lords, who ruled the northern half of the country, sent a large army to attack, which forced Lord Nguyá» n Phúc Thuần to flee to Trấn Biên (present-day ÃÂá»Âng Nai). The Tây Sán kept pursuing Nguyá» n Phúc Thuần and forced him to call for reinforcements from the Nguyá» n garrison in Saigon, but the Nguyá» n governor of Saigon could not send his reinforcements in time. This situation gave ÃÂá» Thanh Nhán the chance to aid the Nguyá» n lord.
In 1775, under the banner of the Nguyá» n Lords, Nhán proclaimed himself ÃÂông Sán Thðợng Tðá»Âng Quân ("Eastern Mountain High General") and gathered an army of 3,000 men, called the ÃÂông Sán army. Then, Nhán led his forces in attacking the Tây Sán and drove them out of Saigon in 1776. After capturing Gia Dinh, Nhán invited the Nguyá» n lord Nguyá» n Phúc Thuần back and was highly rewarded. Thereafter, Nhán conflicted with Lý Tài, an ethnic Chinese mercenary general of the Nguyá» n army, and was forced to flee to Bến Tre where he set up a defensive position.
In midspring of 1777, the Tây Sán defeated the Nguyá» n and captured Saigon. Meanwhile, Lý Tài fled and was captured and killed by Nhon's men. Afterwards, Nhon and his army rejoined the Nguyá» n. The Tây Sán kept pursuing the Nguyá» n and they captured and executed two Nguyá» n lords, Nguyá» n Phúc Thuần and Nguyen Phuc Duong and almost all the Nguyá» n descendants except a few, including Nguyá» n ÃÂnh, the 15-year-old nephew of Nguyá» n Phúc Thuần.
After the killing of the Nguyá» ns, Nguyá» n Huá»Â, one of the three Tây Sán brothers withdrew his troops to the north, leaving a small army in Saigon. In 1778, taking advantage of the absence of the Tây Sán's main force, Nguyá» n ÃÂnh and Nhán led an army of Nguyá» n loyalists in attacking and recapturing Saigon. Afterwards, Nguyá» n ÃÂnh re-established the family's authority in Saigon and proclaimed himseft ÃÂại nguyên súy (Commander-in-chief) of the Nguyá» n clan. The following year, Nhán expelled further Tây Sán troops from the surrounding provinces of Gia ÃÂá»Ânh, and inflicted heavy losses on the Tây Sán naval fleet. Taking advantage of the more favourable situation, Nguyá» n ÃÂnh sent a diplomatic mission to Siam to propose a treaty of friendship. However, this pact was derailed in 1779 when the Cambodians held an uprising against their pro-Siamese leader, Ang Non. Nguyá» n ÃÂnh sent ÃÂá» Thanh Nhán to help the uprising, which saw Ang Non defeated decisively and executed. Nhán returned to Saigon with high honour and concentrated his efforts on improving the Nguyá» n navy.
In 1780, Nguyá» n ÃÂnh proclaimed himself Nguyá» n vðáng (Nguyá» n king or Nguyá» n ruler) and Nhán became "Ngoại hữu, Phụ chÃÂnh, Thðợng tðá»Âng công", the second most-powerful position in the Nguyá» n army.
In 1781, Nguyá» n ÃÂnh pretended to be ill and asked ÃÂá» Thanh Nhán to visit him. Unaware of his leader's trap, Nhán came to the palace and was killed by Nguyá» n ÃÂnh's bodyguards. The reason for this assassination remains unclear, but it was postulated that Nguyá» n ÃÂnh did so because Nhon's fame and military success was overshadowing him.
Although Nguyá» n ÃÂnh foresaw the rebellion of ÃÂá» Thanh Nhán's supporters following their leader's assassination, he could not prevent it, thus badly weakening the Nguyá» n army. Moreover, Nhán's death also led to the recapture of Saigon by the Tây Sán rebels shortly thereafter because Nhán was the Nguyá» n officer that they feared the most and the forces were disunited following his death.
Nhán, along with Châu VÃÂn Tiếp and Võ Tánh, was called "Gia ÃÂá»Ânh Tam Hùng" (Three Heroes of Gia ÃÂá»Ânh) in Vietnamese folk culture.