Kievan Rus'
Mongols

The Mongol Empire invaded Kievan Rus' in the 13th century, devastating numerous cities, including Ryazan, Kolomna, Moscow, Vladimir and Kiev. The siege of Kiev in 1240 by the Mongols is generally understood as the end of Kievan Rus'. Batu Khan went on to subjugate Galicia and Volhynia, raid Poland and Hungary, and founded the Golden Horde at Sarai in 1242. The conquests mostly halted due to a succession crisis following khan Ogedei 's death, leading Batu to return to Mongolia to select the clan's next overlord.
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