紹治帝
The imperial mandarins put off delivering the emperor's reply and fighting broke out. Thiệu Trị had fortified the coast, but the French forces easily defeated the Vietnamese due to the Nguyễn Dynasty's inferior equipment. All of the Vietnamese coastal forts were destroyed and three Nguyễn junks were sunk before the French squadron sailed away. Thiệu Trị 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 Thiệu Trị died shortly afterwards; no missionaries were actually ever executed during his reign.