Collapse of the Tibetan Empire
After King Langdarma's murder Tibet breaks into fiefs
In 842 the Tibetan king Langdarma, remembered by Buddhist tradition as a persecutor of the faith, was assassinated. A succession struggle between his heirs split the empire, revolts swept the country, and for almost four centuries Tibet broke up into independent domains.
Wikipedia (English) · 9th century
Meanwhile around the world (±25 years)
Europe
- 843 Treaty of Verdun — 1 year later
- 865 Great Heathen Army — 23 years later
Eastern Europe & Russia
- c. 862 Calling of the Varangians — 20 years later
Africa
- 859 Fatima al-Fihri founds al-Qarawiyyin — 17 years later
Alive at the time
- Al-Khwarizmi (aged 62)
- Charles the Bald (aged 19)
- Rurik (aged 12)
- Al-Kindi (aged 41)