Editing 1840s (section)

==== China ====
[[File:British ships in Canton.jpg|thumb|[[First Opium War]]: British ships approaching [[Guangzhou|Canton]] in May 1841]]
On August 29, 1842, the [[First Opium War|first of two Opium Wars]] ended between China and Britain with the [[Treaty of Nanking]]. One of the consequences was the [[cession]] of modern-day [[Hong Kong Island]] to the British. Hong Kong would eventually be [[Transfer of sovereignty over Hong Kong|returned to China]] in 1997.

On July 3, 1844 the United States signed the [[Treaty of Wanghia]] with the Qing Empire.<ref>{{cite web |title=Treaty Of Wangxia (Treaty Of Wang-Hsia 望廈條約), May 18, 1844 |url=https://china.usc.edu/treaty-wangxia-treaty-wang-hsia-%E6%9C%9B%E5%BB%88%E6%A2%9D%E7%B4%84-may-18-1844 |website=USC US-China Institute |publisher=USC Annenberg}}</ref> The treaty established five U.S. [[treaty ports]] in China with [[extraterritoriality]] and was the first unequal treaty that the United States imposed on the dynasty.