In 1207, he led his armies against the kingdom of Xi Xia and, after two years, forced it to surrender. In 1211, Genghis Khan's armies struck the Jin Dynasty in northern China, lured not by the great cities' artistic and scientific wonders, but rather the seemingly endless rice fields and easy pickings of wealth. What was the reason for Genghis Khan's armies attacking the Jin Dynasty?
1) To capture the great cities' artistic and scientific wonders
2) To conquer the kingdom of Xi Xia
3) To obtain wealth from the endless rice fields
4) To establish dominance in northern China