1237-1240 (jan 1, 1237 – jan 1, 1240)
Description:
Mongols invade the Kievan Rus principalities, destroying numerous cities and ending Kiev's power. Tatars establish the empire of the golden horde in southern Russia and the Khan of the Golden Horde becomes overlord of all the Russian princes.
Added to timeline:
russian assinment.
source:http://www.bbc.com/news/world-europe-17840446
Date:
