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Tây Sơn Dynasty
Nguyễn Văn Nhạc
Thái Đức Thông Bảo
(Reverse With Vạn Tuế)
西山朝
阮文岳
泰德通寶
(背萬歲)
Item number: A3082
Year: AD 1787
Material: Brass
Size: 23.9 x 23.8 x 0.5 mm
Weight: 2.35 g
Provenance: Spink 2023
This is a “Thái Đức Thông Bảo” coin, cast and circulated by Emperor Thái Đức (Nguyễn Văn Nhạc) in the ninth year of the Thái Đức era (AD 1787), made of brass.
The coin follows the traditional square-holed round format characteristic of the Sinosphere. The obverse inscription, “Thái Đức Thông Bảo,” is written in regular script and read vertically from top to bottom, right to left. The characters are relatively small. The right component of the character “Thông” (通) uses the radical “コ” in place of the standard “マ” form, and its horizontal stroke extends to the left. The left radical of “Thông,” commonly written with a dot and turning stroke (辶), is here rendered as two dots and a vertical line, with a folded finishing stroke at the bottom. All four characters connect to both the square hole and the rim. On the reverse, the coin features the cursive inscription “Vạn tuế” (Long Live) in wild cursive script. It is a laudatory coin issued during the year Nguyễn Văn Nhạc proclaimed himself Emperor Thái Đức of the Tây Sơn regime.
In the mid-18th century, the nominal rule of the Later Lê Restoration was held by the Lê emperors, while real political power in the north was exercised by the Trịnh lords. In the south, the Nguyễn lords effectively controlled the region as the de facto rulers of the quasi-independent kingdom of Quảng Nam. This situation of north-south division had lasted for over two centuries. Due to the prolonged military stalemate between the north and the south, successive Nguyễn lords turned to expansion toward the west and the south, interfering in Cambodia (present-day Cambodia), and launching campaigns against the Cham people and Siam (present-day Thailand). Regardless of whether the fronts were in the north, west, or south, military mobilisation and logistics often relied on the Tây Sơn region, eventually becoming a root cause of local uprisings.
The Tây Sơn uprising was initiated in AD 1771 by three brothers—Nguyễn Văn Nhạc, Nguyễn Văn Lữ, and Nguyễn Văn Huệ—in the Tây Sơn region. They revolted against the Nguyễn lords of Quảng Nam, condemning their corruption and incompetence. Supported by mountain-dwelling communities hardened by years of warfare, the Tây Sơn forces swiftly captured Quy Nhơn and Quảng Ngãi, destabilising the long-standing north-south division. In AD 1775, the capital of Quảng Nam, Phú Xuân (modern-day Huế), fell. In AD 1777, Nguyễn Văn Huệ captured Gia Định, ending the Nguyễn lineage, while a collateral descendant, Nguyễn Phúc Ánh, fled into exile. In AD 1778, Nguyễn Văn Nhạc proclaimed himself the King of Tây Sơn at Trà Bàn (present-day Quy Nhơn) and adopted the era name Thái Đức.
Nguyễn Văn Nhạc’s political philosophy was deeply influenced by traditional Confucianism. He emphasised propriety and ritual order, and his governance was more conservative compared to that of his younger brother, Nguyễn Văn Huệ, with less success in internal reform and military efficiency. Although nominally the head of the Tây Sơn regime, actual military and political power largely resided in the hands of Nguyễn Văn Huệ. In AD 1786, Nguyễn Văn Huệ launched a campaign northward and overthrew the Trịnh regime. This imbalance of power led to internal tensions among the brothers. In AD 1787, Nguyễn Văn Nhạc declared himself Central Emperor and formally enfeoffed Nguyễn Văn Lữ and Nguyễn Văn Huệ as King of Eastern Định and King of Northern Bình respectively—a gesture of division cloaked as feudal delegation. However, conflicts could not be avoided; Nguyễn Văn Huệ even led troops against Quy Nhơn. Though reconciliation followed, the rift remained irreparable.
From that point forward, Nguyễn Văn Nhạc’s influence and authority steadily waned. He was increasingly unable to counter Nguyễn Phúc Ánh’s persistent attempts to restore the Nguyễn regime along the coastal regions. In AD 1788, Nguyễn Văn Huệ defeated the Qing army that had come to aid the Lê dynasty and proclaimed himself Emperor Quang Trung in Phú Xuân, effectively eclipsing Nguyễn Văn Nhạc’s rule. Although Nguyễn Văn Nhạc continued to call himself the Central Emperor, his power was marginalized.
In AD 1793, Phú Xuân was besieged by Nguyễn Phúc Ánh’s navy with support from French volunteers. Nguyễn Quang Toản, son of Nguyễn Văn Huệ, sent reinforcements to lift the siege, but they remained stationed at the city and refused to depart. Feeling humiliated and powerless in the face of this insubordination, Nguyễn Văn Nhạc died in grief.
西山朝由阮文岳(Nguyễn Văn Nhạc)、阮文侶與阮文惠三兄弟於公元1771年在西山地區起兵,反對廣南阮氏的貪腐與無能。在經年歷戰的山民支持下,迅速佔領歸仁、廣義等地,動搖越南南北分裂的格局。公元1775年,廣南國都城富春(今順化)陷落。公元1777年阮文惠陷嘉定,末代阮主亡,支脈阮福映流亡。公元1778年阮岳於闍槃(今歸仁)稱西山王,改元泰德。阮文岳政治理念受傳統儒學影響較深,重視名分與朝儀,統治風格相較其弟更為保守,對內改革與軍政效率不及阮文惠。雖為西山政權的名義元首,實際軍政大權多掌握於阮文惠手中。公元1786年,阮文惠北上攻滅鄭主。由於權力失衡,兄弟間產生矛盾。公元1787年,阮文岳稱中央皇帝,分封阮文侶與阮文惠為東定王與北平王,名為分封,實則裂土。但無法阻止衝突,阮文惠一度出兵攻打歸仁,雙方雖後來和解,但裂痕難以彌補。此後阮文岳的地位與實權日益衰退,面對阮福映於沿海為復國一再的挑戰逐漸力不從心。公元1788年,阮文惠擊敗清援黎軍,於富春稱光中帝,等同架空阮文岳。阮文岳雖仍自稱中央皇帝,權力卻逐漸被邊緣化。公元1793年,富春遭阮福映水軍與法國志願軍圍攻,阮文惠子阮光纘遣軍解圍,然而據城不走,阮文岳憤死。