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First Opium War and the Treaty of Nanking

1839–1842 (Treaty of Nanking, 29 August 1842)·Military & conflict·Qing China (south and east coast)·
1839–1842 (Treaty of Nanking, 29 August 1842)Date
Military & conflictCategory
29Empires active
Date
1839–1842 (Treaty of Nanking, 29 August 1842)
Category
Military & conflict
Region
Qing China (south and east coast)
Era
Modern
Significance

The First Opium War (1839–1842) pitted the Qing dynasty against the British Empire after China's suppression of the illegal opium trade at Canton.

From 1840 a Royal Navy expedition exploited overwhelming technological superiority—steam-powered gunboats, heavier cannon and disciplined infantry—to defeat Qing forces along the coast and the Yangtze, threatening Nanjing by August 1842. The conflict ended with the Treaty of Nanking, signed on 29 August 1842, the first of what the Chinese came to call the 'unequal treaties.' Its terms ceded Hong Kong Island to Britain in perpetuity, opened five treaty ports (Canton, Amoy, Foochow, Ningpo and Shanghai) to British trade and residence, abolished the Cohong monopoly, imposed a large indemnity, and—through supplementary agreements—granted extraterritoriality and most-favoured-nation status to British subjects. The war shattered Qing claims to manage foreigners on its own terms and inaugurated what Chinese historiography calls the 'century of humiliation.' It opened China to expanding Western (and later Japanese) commercial and political penetration, and stands as a defining episode in the nineteenth-century encounter between European imperial power and the Asian states.

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Empires active in 1839–1842 (Treaty of Nanking, 29 August 1842)

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