Answer:
Second Opium War。Also known as the Battle of The Anglo-French Forces. The war of aggression against China jointly launched by the two capitalist countries of Britain and France from 1856 to 1860 was the continuation and expansion of the First Opium War, so it was called the Second Opium War. In the fourth year of Xianfeng (1854), in order to expand their rights and interests in aggression, Britain and France proposed to the Qing government to amend the Treaty of Nanking, but the Qing government refused. In the sixth year of Xianfeng (1856), the British army attacked Guangzhou and was repulsed. The following year, Britain and France formed a coalition army to invade China and capture Guangzhou. In the eighth year of Xianfeng (1858), the British and French fleets went north, and with the support of Russia and the United States, they captured the Dagu Fort and forced Tianjin. Britain, the United States, France, and Russia forced the Qing government to sign the Treaty of Tianjin separately. Subsequently, Britain, the United States, and France forced the Qing government to sign the "Articles of Commerce". Russia used force to force the Qing Heilongjiang general Yishan to sign the Treaty of Yaohun. In the ninth year of Xianfeng (1859), Britain and France attacked Dagukou again under the pretext of exchanging contracts, but were counterattacked by the Qing army, and the British and French fleets were severely damaged. In the Xianfeng Decade (1860), the British and French forces once again launched a large-scale invasion of China, capturing Dagukou, occupying Tianjin, and then invading Beijing. Britain, France, and Russia forced the Qing government to sign the Treaty of Beijing with it, and forced the Qing government to ratify the Sino-British and Sino-French Treaty of Tianjin and recognize the Treaty of Yaohun signed by Russia and Yishan. The Second Opium War further reduced China to a semi-colonial and semi-feudal society.
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