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Casus Belli for First Opium War

When
1839–1842
Where
Qing China
Part of
Event of 1839: Destruction of opium at Humen begins, casus belli for Britain to open the 3-year

The destruction of opium provided the casus belli for Great Britain to declare war on Qing China, initiating the First Opium War.

The action provided casus belli for Great Britain to declare war on Qing China. What followed is known as the First Opium War (1839–1842), which initiated China's opening for trade with foreign nations under a series of treaties.

Sources

  1. Destruction of opium at Humen Wikipedia, revision of 2026-08-31

Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.