请求：北京历史的英文介绍

History

Since 723 B.C. several cities, bearing various names, have existed at this site. The nucleus of the present city was Kublai Khan's capital, Cambuluc (constructed 1260–90). Under the name Beijing [Chin.,=northern capital] the city was the capital of China from 1421 until 1911. The gateway to Mongolia and Manchuria, it was often the prize of contending armies.

In 1860, Great Britain and France captured it after the battle of Baliqiao and forced the Chinese government to concede the Legation Quarter for foreign settlements. This cession was among the factors responsible for the Boxer Uprising (1900), in which the foreign colony was besieged until relieved by a combined expeditionary force of American, Japanese, and European troops. The foreign powers exacted a treaty that provided for the permanent garrisoning of foreign troops in Beijing.

The city changed hands repeatedly during the civil wars that followed the establishment of the Chinese