The First Opium War (1839–1842) and Second Opium War (1856–1860) were fought by Britain and France against China over trade rights and — most controversially — the British opium trade. Both wars ended with China ceding territory, opening treaty ports and granting foreigners legal immunity: the start of China's "century of humiliation".
What caused the First Opium War?
The underlying cause was a trade imbalance. In the early 19th century, Britain was importing vast quantities of Chinese goods — silk, porcelain and, above all, tea — but China had little interest in British manufactures. British merchants paid in silver, which drained from Britain to China. To reverse this, the British East India Company began exporting opium from its Indian territories (Bengal) to China.
Opium — a highly addictive narcotic — created a large and profitable Chinese market. By the 1830s, opium imports had reversed the trade balance: silver was now flowing from China to Britain's advantage. The Qing government, alarmed by the social damage of mass addiction and the economic drain, banned the trade.
In 1839, the Chinese Imperial Commissioner Lin Zexu took decisive action at Canton (Guangzhou): he confiscated and destroyed over 20,000 chests of British-owned opium worth roughly £2 million. He wrote to Queen Victoria appealing to her morality and asking her to stop the trade. Britain's government chose a different response.
The British Parliament debated whether to go to war over opium — a product many MPs found morally embarrassing. The motion to send a naval expedition passed by only nine votes. Gladstone, then a young MP, called it "a war more unjust in its origin, a war more calculated to cover this country with permanent disgrace."
How did the military campaign of the First Opium War unfold?
Britain's military advantage was overwhelming. The Royal Navy deployed steam-powered gunboats — a technology China could not match. British forces:
- Captured the port of Chusan (modern Zhoushan) in 1840
- Seized Canton's outer defences in 1841
- Moved north along the coast and threatened the Grand Canal (vital for supplying Peking)
- Took Nanking in August 1842, forcing China to negotiate
The military disparity between British steamships armed with modern guns and the Qing military — equipped with technology little changed since the 17th century — was stark. China's defeat was swift and complete.
What did the Treaty of Nanking (1842) establish?
The Treaty of Nanking is often described as the first of China's "unequal treaties". Its main terms:
| Provision | Detail |
|---|---|
| Hong Kong island | Ceded to Britain "in perpetuity" |
| Treaty ports | Five ports (Canton, Amoy, Fuzhou, Ningbo, Shanghai) opened to British trade and residence |
| Indemnity | China paid £21 million in silver to Britain |
| Most-favoured-nation status | Any privilege later granted to other foreign powers automatically applied to Britain |
| Extraterritoriality | British citizens in China could be tried by British courts, not Chinese ones |
Extraterritoriality was particularly significant: it placed foreign nationals effectively beyond Chinese law on Chinese soil. Subsequent treaties with France, the United States and other powers replicated these terms.
What caused the Second Opium War?
The Second Opium War (also called the Arrow War) began in October 1856 with an incident in Canton: Chinese officials boarded a vessel called the Arrow, which had previously been registered under a British flag (its registration had in fact lapsed). Britain treated this as an attack on its flag and demanded an apology. When China's response was deemed insufficient, British forces bombarded Canton.
France joined Britain following the execution of a French Catholic missionary in southern China. Together, allied forces:
- Captured Canton (1857)
- Seized the Taku Forts guarding Tianjin (1858)
- Forced China to sign the Treaty of Tientsin (1858), granting further concessions
- After China resisted full ratification, advanced to Peking in 1860
- Burned and looted the Old Summer Palace (Yuanmingyuan) — one of the most celebrated imperial gardens in the world
The burning of the Summer Palace on the orders of Lord Elgin (Britain's diplomatic representative) was an act of deliberate cultural destruction. Lord Elgin's father is remembered for removing the Parthenon marbles from Greece; the son is remembered in China for destroying the Summer Palace. Both remain objects of historical controversy.
What were the consequences of the Opium Wars?
The Opium Wars had lasting consequences that shaped China's modern history:
- Territorial losses: Hong Kong remained British until 1997. Treaty port concessions persisted in various forms until 1943.
- The "century of humiliation": Chinese nationalism from the 19th century onwards has been shaped by the memory of these defeats and the unequal treaties — a collective injury that continues to inform Chinese foreign policy today.
- Qing weakness exposed: The military failures revealed that the Qing dynasty had fallen far behind Western military technology. Attempts at modernisation were too slow, and the dynasty fell in 1911.
- Hong Kong's development: As a British colony, Hong Kong developed a legal and commercial infrastructure that would shape its distinctive character into the 21st century.
What are the different perspectives on the Opium Wars?
Evaluating the Opium Wars requires considering multiple viewpoints:
British official perspective (at the time): This was a matter of free trade and the protection of British subjects and their property under international law. China had illegally seized British goods.
Gladstonian criticism (contemporary British): The war was fought to protect an immoral trade that Britain's government should have suppressed, not defended.
Chinese perspective: The wars were unprovoked aggression by a foreign power seeking to force a poisonous and addictive substance on the Chinese population for commercial profit — the defining trauma of modern Chinese history.
Subsequent historical view: Most British historians today acknowledge that the war was fought to protect a drug trade the British government knew was harmful. The "free trade" argument was a rationalisation. The Opium Wars are a case study in imperial power using violence to impose favourable commercial terms.
Frequently asked questions
Was the opium trade legal?
In Britain and India it was legal and the East India Company operated it as a government-approved monopoly. In China it was illegal from 1800 onwards, and from 1839 the ban was actively enforced. The British government's position — that China had no right to seize British goods — depended on not acknowledging China's right to ban the trade within its own territory. This is the core of why historians describe the war as "unjust in its origin".
What happened to Hong Kong after 1842?
Hong Kong island was ceded in 1842, Kowloon peninsula was added in 1860 (Second Opium War) and the New Territories were leased for 99 years in 1898. Because the lease (not an outright cession) was due to expire in 1997, Britain and China negotiated the handover of the entire territory in the Sino-British Joint Declaration (1984). Hong Kong was returned to China on 1 July 1997 under the "one country, two systems" framework.
Did Britain ever apologise for the Opium Wars?
No formal governmental apology has been issued. The Opium Wars remain a sensitive topic in British-Chinese relations. Artefacts looted from the Summer Palace are held in museums across Europe, and there have been ongoing calls — including from the Chinese government — for their return.
How do the Opium Wars connect to other topics in KS3 history?
The Opium Wars connect to several KS3 themes: the British Empire and its methods; the role of trade and economics in causing conflict; attitudes to race and "civilisation" that shaped imperial policy; and the long-term consequences of colonialism that are still felt today. They also connect to the study of cause and consequence — the wars had effects (the century of humiliation, Chinese nationalism, the founding of the People's Republic) that continue to shape world politics.
Want to weigh Lin Zexu's letter against Britain's parliamentary debate and decide whose argument was stronger? Professor Harari at aitutors.me helps you build an evidence-based, perspective-aware historical case.