7.. you answered the question in the question! :)
They were adapted to the land. They planted crops. They needed to trade for supplies. Did not think they would need to plant crops.
It was the Mamluks. A Mamluk was a soldier who converted to Islam, and over the time that the military used, they became stronger and more powerful military. This was the only way and the only war that the Mongols lost.
Come again I need this in English