紹治帝
Emperor Thiệu Trị 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, Thiệu Trị 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 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 Trị 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.