Dali (大理 pinyin: Dàlǐ) was a Bai kingdom centered in what is now Yunnan Province of the People's Republic of China. Established by Duan Siping in 937, it was ruled by a succession of 22 kings until the year 1253, when it was destroyed by an invasion of the Mongol Empire. The capital city was Dali.
The Kingdom of Dali was preceded by the Nanzhao Dynasty, which was overthrown in 902. Three dynasties followed in quick succession, until Duan Siping seized power in 937 and established Dali.
There is a story about how the Dali kingdom finally fell, and although it may be merely a legend, it is nevertheless worth telling. Despite their military prowess and superior numbers, the Mongols could not breach the defences of the Erhai valley, which was so suited to defence that even just a few defenders could hold out for years. It is said that the Mongols found a traitor who led them over the Cangshan mountains along a secret path, and only in this way were they able to penetrate and overrun the Bai defenders. Thus ended five centuries of independence. In 1274 the Province of Yunnan was created, and the region has since been incorporated within China.
