Lin Zexu's destruction of opium at Humen triggered the First Opium War.
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First Opium War (1839-1842): Britain vs Qing, ended with the Treaty of Nanjing ceding Hong Kong Island. Second Opium War (1856-1860): Britain and France vs Qing, ended with Anglo-French troops burning the Old Summer Palace (圆明园). In Chinese historiography, this marks the start of 近代史 (modern history) and the 百年国耻 (century of humiliation).