Tây Thành province

Tây Thành Province Trấn Tây Thành (鎮西城) (Vietnamese) ត្រានតាយថាញ់ (Khmer)
Province of Nguyễn dynasty Vietnam
1834–1847
Seal of Protector General of Trấn Tây Thành
Map of Trấn Tây Thành in 1838 and its districts
Capital	Nam Vang
Population
• 1840	970,516
Government
• Type	Monarchy under Vietnamese administration
Protector-General
• 1834–1841	Trương Minh Giảng
Monarch of Cambodia
• 1835–1846	Ang Mey
Historical era	New Imperialism
• Vietnamese invasions of Cambodia	1834
• Cambodian rebellion	1840
• Peace treaty between Siam and Vietnam	1847
Preceded by Succeeded by Kingdom of Cambodia Kingdom of Cambodia
Today part of	Cambodia

Part of a series on the
History of Cambodia
Early history
Funan Chenla Khmer Empire Angkor Khmer–Cham wars Đại Việt–Khmer War
Post-Angkor period
Chaktomuk era Longvek era Siamese-Cambodian War Cambodian–Spanish War Cambodian–Dutch War Oudong era Loss of Mekong Delta Nguyễn Kingdom's invasion
Colonial period
French protectorate French Indochina Japanese occupation (Cambodia in 1945)
Independence and conflict
Post-independence US bombing Sihanouk Trail Cambodian campaign 1970 coup Khmer Republic US bombing Cambodian Civil War Fall of Phnom Penh Democratic Kampuchea Mayaguez incident Cambodian genocide Cambodian–Vietnamese War People's Republic of Kampuchea exiled coalition government K5 Plan
Peace process
Cambodian Conflict (1979–1998) 1991 Paris Peace Agreements United Nations Transitional Authority (UNTAC, 1992–93) 1993 election Khmer Rouge PGNUNSC
Modern Cambodia
Economy 1997 coup Khmer Rouge Tribunal 2003 Phnom Penh riots Cambodian–Thai border dispute 2013–2014 protests COVID-19 pandemic
By topic
Buddhism Economic history Humanitarian crisis Military history Monarchy Names
Timeline
Cambodia portal
v t e

Tây Thành was formerly the 32nd province of Nguyễn Vietnam, encompassing what is now modern-day Cambodia. Its capital was the Cambodian capital of Phnom Penh (known to the Vietnamese as "Nam Vang"). It was a special province with a dual system, consisting of Cambodian monarchs who reigned as puppet rulers while a Vietnamese governor resided in Phnom Penh. The province was finally abolished in 1847 after peace talks between Thailand and Vietnam concluded dual-suzerainty over Cambodia.

In 1834 the vassal king of Cambodia, Ang Chan II, was escorted back to Cambodia by Vietnamese troops following a three-year war. The Tây Thành province was formed in late 1834 after Vietnamese emperor Minh Mạng's edict that appointed General and the Resident-Superior of Cambodia Trương Minh Giảng as governor of Tây Thành province. Cambodian princess Ang Mey, daughter of king Chan, was crowned as de jure ruler of Cambodia in early 1835 with a Vietnamese-style ceremony.^[1] From 1835 to 1840, Minh Mạng began conducting the progress of what historians called The Vietnamization of Cambodia in order to assimilate the Cambodians into Vietnamese cultural sphere and Vietnamese ethnicity.^[2][3]

Frustrated with the slowness of his program, in June 1840 Minh Mạng demoted Mey and the other princesses. In August 1841 they were all arrested and deported to Vietnam along with the Cambodian royal regalia. Spurred by the death of Princess Ang Baen and the absence of their Queen Ang Mey, many Cambodian courtiers and their followers revolted against the Vietnamese rule. The death of Minh Mang in 1841 changed the situation. Vietnamese offices and soldiers in Tây Thành province were assassinated by Cambodian guerillas while the governor Trương Minh Giảng had been recalled by the newly crowned emperor Thieu Tri to deal with internal rebellions.^[4] After a failed attempt to place Prince Im on the Cambodian throne in late 1841, Trương Minh Giảng committed suicide.^[5]

The Siamese launched an offensive in late 1841 and took Phnom Penh with ease, but had to withdraw in 1844 to Oudong. After having suppressed internal rebellions, the Vietnamese counterattacked and placed Queen Ang Mey on the throne in 1845. After reached a peace agreement with Siam, in June 1847 the Vietnamese court released all royal members of the Cambodian ruling family, transferred the government to the new independent Cambodian monarchy of king Ang Duong and withdrew their army from Cambodia, ending the Tây Thành province.^[6]