The Opium Wars were two armed conflicts between Qing China and Western powers that reshaped East Asian geopolitics and inaugurated what Chinese historiography calls the "Century of Humiliation."
The First Opium War (1839–1842) grew out of Britain's large-scale smuggling of Indian-grown opium into China to offset its trade deficit in tea, silk, and porcelain. When the Daoguang Emperor dispatched Commissioner Lin Zexu to Canton (Guangzhou), Lin confiscated and destroyed roughly 20,000 chests of British opium in 1839. Britain responded with a naval expedition. Superior steam-powered warships and artillery overwhelmed Qing coastal defenses. The war ended with the Treaty of Nanking (29 August 1842), which ceded Hong Kong Island to Britain, opened five "treaty ports" (Canton, Amoy, Foochow, Ningpo, Shanghai), imposed an indemnity, and fixed tariffs. Supplementary agreements added extraterritoriality and most-favored-nation clauses, becoming the template for the "unequal treaties."
The Second Opium War (1856–1860), sometimes called the Arrow War, was triggered by the Qing boarding of the Arrow, a Chinese-owned but Hong Kong-registered ship, and the killing of a French missionary. Britain and France launched a joint campaign, later supported diplomatically by Russia and the United States. Anglo-French forces captured Canton, the Taku Forts, and Beijing, where they looted and burned the Old Summer Palace (Yuanmingyuan) in October 1860. The Treaties of Tianjin (1858) and the Convention of Peking (1860) legalized the opium trade, opened additional ports, permitted foreign legations in Beijing, allowed Christian missionary activity inland, and ceded Kowloon to Britain. Russia separately gained the Outer Manchurian territories.
The wars accelerated Qing decline, fueled domestic upheavals such as the Taiping Rebellion, and remain a foundational reference point in modern Chinese nationalism, sovereignty discourse, and contemporary critiques of Western-led international order.
Example
In 2010, Chinese officials cited the burning of the Old Summer Palace during the Second Opium War when objecting to the auction of looted Yuanmingyuan bronzes in Paris.
Frequently asked questions
Because the immediate trigger of the first war was the Qing government's attempt to suppress British smuggling of opium into China, though the broader causes involved trade imbalances and demands for diplomatic and commercial access.
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