Second Opium War

The Second Opium War (1856-1860) was a conflict between Britain and China, triggered by disputes over trade, diplomatic rights, and the illegal opium trade. Britain sought to expand its influence and open more Chinese ports, while China aimed to suppress opium and enforce its laws. The war resulted in China's defeat, leading to the Treaty of Tientsin, which forced China to legalize opium, allow foreign diplomats, and give Britain and other powers territorial concessions. Essentially, it was a conflict driven by economic interests and imperial expansion, significantly weakening China's sovereignty and increasing Western influence in the region.