Thiá»Âu Trá» (, , lit. "inheritance of prosperity"; 6 June 1807 â 4 November 1847), personal name Nguyá» n Phúc Miên Tông or Nguyá» n Phúc Tuyá»Ân, was the third emperor of the Nguyá» n dynasty. He was the eldest son of Emperor Minh Mạng, and reigned from 14 February 1841 until his death on 4 November 1847. He died at the age of 41, according to some reports, of apoplexy. He was interred in the Xðáng LÃÂng tomb (also known as the Tomb of Thiá»Âu Trá»Â) located in Huế, which was completed by his son and successor, Emperor Tá»± ÃÂức.
Emperor Thiá»Âu Trá» was much like his father, Minh Mạng, and carried on his conservative policies of isolationism and the entrenchment of Confucianism. Highly educated in the Confucian tradition, Thiá»Âu Trá» had some curiosity about the West, but like his father was very suspicious of all non-Vietnamese outsiders. At this same time, the French were in a colonial race with Great Britain in Southeast Asia and were pushing hard for stronger relations with Indochina. This, just as in the reign of Minh Mạng, also brought up Christian missionaries, mostly Spanish and French, who ignored the ban. When Trá» began to imprison the missionaries, it prompted an immediate response from France. In 1843, the French government sent a military expedition to Indochina with orders to protect and defend French interests, free the illegal missionaries, if possible without causing an international incident.
Trá»Â's determination to eliminate all Roman Catholic missionaries from his country could not be reconciled with a peaceful relationship with France. In 1845, this almost prompted a clash between Vietnam and the American warship USS Constitution which attempted to force Trá» to free the missionary Dominique Lefèbvre, who had repeatedly come to Vietnam illegally multiple times. The French task force reached Tourane, modern day Da Nang, on 23 March 1847, and demanded that the safety of French nationals be assured and for Thiá»Âu Trá» to cease the persecution of missionaries.
The imperial mandarins put off delivering the emperor's reply and fighting broke out. Thiá»Âu Trá» had fortified the coast, but the French forces easily defeated the Vietnamese due to the Nguyá» n dynasty's inferior equipment. All of the Vietnamese coastal forts were destroyed and three Nguyá» n junks were sunk before the French squadron sailed away. Thiá»Âu Trá» called all missionaries enemy spies and demanded that all Christians should be executed on the spot. The mandarins did not put this order into effect and Emperor Thiá»Âu Trá» died shortly afterwards; no missionaries were actually ever executed during his reign.
Tri was deeply disturbed by the Tourane battle, not only because of the loss of men and material but also from a sense of impending doom unless he could find a way to manage the threat posed by the French Navy. According to the True Records of the Great South (Dai Nam Thuc Luc), he reportedly said:<blockquote>"The Westerners are cunning. If we abolish our laws against Christianity, the British will hear of it and demand that we abolish our laws against opium. The Westerners are wolves: there is no way to satisfy them! What can we do when everything must be according to their demands? Moreover, Christianity is a false religion and its harm to us has reached the level of foreign relations and has opened the door to war. Opium is an anesthetic, and it utterly ruins human lives. These two things are both strictly forbidden and we will publicly affirm this so that it will be known in the history written by future generations...The Westerners are not simply one country. For example, the Dutch we never see and when they send messages to us they are not from a king but from some strange authority that we cannot understand. But the French, although we have released them from prison many times, despite forbidding them to enter our country, and we thereby deserve their thanks, still they sprout more desperate schemes. Let us wait for the return of our traveling officials, and we can ask them about French intentions. If this enemy has some aggressive idea, Saigon and Hai Phong will also be places of danger, not only Da Nang.</blockquote>