The Arrow Incident refers to the events of 8 October 1856, when Qing marines boarded the Arrow, a small lorcha (a hybrid Chinese-hulled, European-rigged vessel) anchored at Canton (Guangzhou), and arrested twelve of its Chinese crew on suspicion of piracy and smuggling. The ship was Chinese-owned but had been registered in British Hong Kong under the colonial registration ordinance, and it carried a nominal Irish-born captain, Thomas Kennedy. Critically, the vessel's Hong Kong registration had expired eleven days before the seizure, so it was arguably not entitled to fly the British flag. Harry Parkes, the British acting consul at Canton, nonetheless alleged that the Qing soldiers had hauled down a British ensign — an insult to the Crown — and demanded the release of the crew and a formal apology from the Imperial Commissioner for Guangdong and Guangxi, Ye Mingchen (Yeh Ming-ch'en). Parkes invoked the most-favoured-nation and consular protections claimed under the Treaty of Nanjing (1842) and the Treaty of the Bogue (1843).
Mechanically, the incident functioned as a casus belli manufactured to reopen the China trade question. Britain, dissatisfied with the limited concessions of the first Opium War, sought treaty revision — legalisation of opium, the opening of more ports, diplomatic residence at Beijing, and the right of inland travel. When Ye Mingchen released the crew but refused a full apology, the British plenipotentiary Sir John Bowring and Admiral Sir Michael Seymour ordered the bombardment of Canton in late October 1856. The dispute over whether the flag had even been flying — Ye insisted it was not — made the British case legally thin, a point seized upon in the House of Commons, where Richard Cobden's censure motion in March 1857 actually defeated Lord Palmerston's government; Palmerston then won the ensuing general election and prosecuted the war regardless.
The Arrow Incident triggered the Second Opium War (1856–1860), also called the Arrow War, in which Britain was joined by France (using the murder of missionary Auguste Chapdelaine as its own pretext). The conflict produced the Treaties of Tianjin (1858) and, after the Anglo-French sack and burning of the Old Summer Palace (Yuanmingyuan) in October 1860, the Convention of Beijing (1860). These instruments opened additional treaty ports, legalised the opium trade, permitted foreign legations at Beijing, ceded Kowloon to Britain, and — through a separate treaty — confirmed vast Russian territorial gains in the Amur and Ussuri regions. The settlement deepened the "unequal treaty" system and accelerated the Qing decline.
For the exam, the Arrow Incident appears in the China Modern History and World History segments and in the foreign-relations / colonialism papers common to UPSC, FSOT, CSS and BCS. Examiners typically ask candidates to distinguish the pretext (the flag and crew dispute) from the underlying cause (British demand for treaty revision and expanded trade), to link it to the Second Opium War's outcomes, and to assess its place in the broader "century of humiliation" narrative. A strong answer names Parkes, Ye Mingchen, Bowring, Palmerston and Cobden, and connects the incident to the Treaties of Tianjin and the Convention of Beijing.
Example
In March 1857 Richard Cobden's Commons motion censuring the Canton bombardment over the Arrow Incident defeated Lord Palmerston, who then won the general election and prosecuted the Second Opium War.
Frequently asked questions
Britain's underlying aim was treaty revision — legalised opium, more open ports, and a Beijing legation — not redress for one lorcha. The Arrow's expired Hong Kong registration and the disputed flag merely supplied a convenient diplomatic trigger for a war Britain already sought.