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In page Mongol invasion of Kievan Rus':
"The vast Mongolian Great Khanate army of around 120,000[1] mounted archers, commanded by Batu Khan and Subutai, crossed the Volga River and invaded Volga Bulgaria in late 1236. It took them only a month to extinguish the resistance of the Volga Bulgars, the Cumans-Kipchaks and the Alans.[citation needed]
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