In 1237, the mongol invasion began in Batu Khan. Whole cities were destroyed and entire populations decapitated.
The mongols established the biggest empire the world has ever seen, stretching from the pacific ocean to Eastern Europe.
HEAVY DEVASTATION IN RUSSIA
Russians adopted Mongols’ weapons, court practices, diplomatic rituals, taxation system, and military draft
MONGOLS DID NOT FULLY OCCUPY RUSSIA
The mongols divided their massive empire into smaller states called Hordes.
The conquest of Russia was called the "Khanate of the Golden Horde". Moscow was the primary center for Mongol domination.(never actually in Russia) This conquest was worse than the conquest in Persia by far.
Russians had very little to offer because of their less developed economy and it wasn't located on any major trade routes.