We already know the answer: https://en.wikipedia.org/wiki/First_Opium_War https://en.wikipedia.org/wiki/First_Opium_War . In the 17th and 18th centuries, the d

We already know the answer: https://en.wikipedia.org/wiki/First_Opium_War https://en.wikipedia.org/wiki/First_Opium_War . In the 17th and 18th centuries, the demand for Chinese goods (particularly silk, porcelain, and tea) in Europe created a trade imbalance between Qing Imperial China and Great Britain. European silver flowed into China through the Canton System, which confined incoming foreign trade to the southern port city of Canton. To counter this imbalance, the British East India Company began to grow opium in India and smuggle them into China illegally. The influx of narcotics reversed the Chinese trade surplus, drained the economy of silver, and increased the numbers of opium addicts inside the country, outcomes that worried Chinese officials. In 1839, the Daoguang Emperor, rejecting proposals to legalize and tax opium, appointed viceroy Lin Zexu to go to Canton to halt the opium trade completely[8]. Lin wrote to Queen Victoria an open letter in an appeal to her moral responsibility to stop the opium trade.[9] When he failed to get a response, he initially attempted to get foreign companies to forfeit their opium stores in exchange for tea, but this ultimately failed too. Then Lin resorted to using force in the western merchants' enclave. He confiscated all supplies and ordered a blockade of foreign ships to get them to surrender their opium supply. Lin confiscated 20,283 chests of opium (approximately 1210 tons or 2.66 million pounds)[10]. The British government responded by dispatching a military force to China and in the ensuing conflict, the Royal Navy used its naval and gunnery power to inflict a series of decisive defeats on the Chinese Empire,[7] a tactic later referred to as gunboat diplomacy.