Trịnh Sâm

Trịnh Sâm (1739–1782) ruled northern Vietnam from 1767 to 1782 AD. He ruled with the title "Tinh Do Vuong", and was one of the last of the powerful Trịnh lords. Trịnh Sâm defeated the ancient enemy of the northern state, the Nguyễn lords in the south. The Trịnh line was separate from the toyal Lê Dynasty, and the officially recognized king was Lê Hiển Tông (1740–1786), who continued to occupy the royal throne in Thăng Long (modern-day Hanoi), but without real power.

Early reign

Trịnh Sam was given rule over northern Vietnam by his father Trịnh Doanh in 1767. Five years after he took power, the Tây Sơn rebellion started in the south. During his lifetime, the Tây Sơn rebels focused all their efforts against the Nguyễn Lords, specifically against Nguyễn Phuc Thuan who had gained the throne as a young boy. As the Tây Sơn rebellion gained strength, the Trịnh saw the Nguyễn weakening month by month.

Trịnh–Nguyễn War

Trịnh Sâm mobilized the Royal (Trịnh) army, and on November 15, 1774, it crossed the river into Nguyễn territory, re-igniting the Trịnh–Nguyễn War. With the Nguyễn army divided and weak, the Trịnh army captured Phú Xuân (modern-day Huế) in February 1775. The army continued south capturing more Nguyễn lands and defeating some of the forces of the Tây Sơn. In the summer of 1775, one of the leaders of the Tây Sơn, Nguyễn Nhac, made a formal alliance with Trịnh Sam against the Nguyễn. Trịnh Sam agreed and gave Nguyễn Nhac a formal title as well as "regalia". The Trịnh army then withdrew back to Tonkin, left a small army in Phú Xuân.

Later life

For the remainder of Trịnh Sam's life, the Trịnh allowed emperor Gia Long (Nguyễn Ánh), the last surviving member of the Nguyễn Lords, to make repeated attempts to re-take the south. The Tây Sơn brothers were too busy fighting with the Nguyễn loyalists to worry about the Trịnh in the north. In 1782 as Trịnh Sam was dying, he tried to leave control over Vietnam to his son (from his favorite concubine, Đặng Thị Huệ), Trịnh Man, but his rightful heir, Trịnh Khai organized an army and fought against his half-brother. Although he was successful, this civil war fatally divided the Trịnh at a critical time when the Tây Sơn (under Nguyễn Huệ) were gaining control over the south.

Preceded by
Trịnh Doanh		 Ruler of Vietnam
1767-1782 		Succeeded by
Trịnh Khải

Sources

See also

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