I declared war on the mongols because they where in the middle of me and the Iroquois. It just suited this way. I got a Korea and China to Join Me against the Iroquois and I used the cities I got from smashing the mongols to Build settlers. I used the settlers to put around the Iroquois cities that the Chineese and Koreans took. This gave me around 8 new cities when Korea and china got 2 each all suronded by my new cities thats making temples fast.