the regular British Indian Army and East India Company forces. In terms of naval forces, the ships earmarked for the expedition were either posted in remote colonies or under repair, and Oriental Crisis of 1840 (and the resulting risk of war between Britain, France, and the Ottoman Empire over Syria) drew the attention of the Royal Navy's European fleets away from China. Orders were dispatched to British South Africa and Australia to send ships to Singapore, the assigned rendezvous point for the expedition. A number of steamers were purchased by the Royal Navy and attached to the expedition as transports. The unseasonable summer weather of India and the Strait of Malacca slowed the British deployment, and a number of accidents decreased the combat readiness of the expedition. Most notably, both of the 74-gun ships of the line that the Royal Navy intended to use against Chinese fortifications were temporarily put out of action by hull damage. Despite these delays, by mid-June 1840 British forces had begun to assemble in Singapore. While they waited for more ships to arrive, the Royal Marines practiced amphibious invasions on the beach, first by landing ashore in boats, then forming lines and advancing on mock fortifications.
In late June 1840 the first part of the expeditionary force arrived in China aboard 15 barracks ships, four steam-powered gunboats and 25 smaller boats. The flotilla was under the command of Commodore Bremer. The British issued an ultimatum demanding the Qing Government pay compensation for losses suffered from interrupted trade and the destruction of opium, but were rebuffed by the Qing authorities in Canton.
In his letters, Palmerston had instructed the joint plenipotentiaries Elliot and his cousin Admiral George Elliot to acquire the cession of at least one island for trade on the Chinese coast. With the British expeditionary force now in place, a combined naval and ground assault was launched on the Chusan Archipelago. Zhoushan Island, the largest and best defended of the islands was the primary target for the attack, as was its vital port of Dinghai. When the British fleet arrived off of Zhoushan, Elliot demanded the city surrender. The commander of the Chinese garrison refused the command, stating that he could not surrender and questioning what reason the British had for harassing Dinghai, as they had been driven out of Canton. Fighting began, a fleet of 12 small junks were destroyed by the Royal navy, and British marines captured the hills to the south of the Dinghai.
The British captured the city itself after an intense naval bombardment on 5 July forced the surviving Chinese defenders to withdraw. The British occupied Dinghai harbor and prepared to use it as a staging point for operations in China. In the fall of 1840 disease broke out in the Dinghai garrison, forcing the British to evacuate soldiers to Manila and Calcutta. By the beginning of 1841 only 1900 of the 3300 men who had originally occupied Dinghai were left, with many of those remaining incapable of fighting. An estimated 500 British soldiers died from disease, with the Cameron and Bengali volunteers suffering the most deaths, while the Royal Marines were relatively unscathed.
Having captured Dinghai, the British expedition divided its forces, sending one fleet south to the Pearl River while sending a second fleet north to the Yellow Sea. The northern fleet sailed to Peiho, where Elliot personally presented Palmerston's letter to the Emperor to Qing authorities from the capital. Qishan (ᡴᡳᡧᠠᠨ), a high-ranking Manchu official, was selected by the Imperial Court to replace Lin as the Viceroy of Liangguang after the latter was discharged for his failure to resolve the opium situation. Negotiations began between the two sides, with Qishan serving as the primary negotiator for the Qing and Elliot serving as the representative for the British Crown. After a week of negotiations, Qishan and Elliot agreed to relocate to the Pearl River for further negotiations. In return for the courtesy of the British to withdraw from the Yellow Sea, Qi