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I read that the Mongol Empire conquered and unified China. My question is... how were the Mongols able to conquer so much when China's population almost certainly was larger during that time period? Was it because of the use of special tactics, technology, or due to other factors?

marked as duplicate by AllInOne, Rathony, Brasidas, Mark C. Wallace, Ken Graham Oct 4 '16 at 12:29

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