They had to actually collect people who were willing to go, collect enough supplies and Good, weather could have been bad, sickness, lots of people scared to go to a new land
I'm assuming the Israelites, and because they were being treated badly. your question is confusing?<span />
They were fleeing crop failure in their homes and land an job shortages and tax raising
The Mongols had a benevolent attitude toward foreign religions, or at least a policy of benign neglect. Their belief in Shamanism notwithstanding, the Mongols determined early on that aggressive imposition of their native religion on their subjects would be counter-productive.
A I guess :/. I think its A