So he can win the war by building up his forces.
A secondary source could be less biased over a primary source:)
The silk road was under Mongol control.
Throughout history language has done a great job of uniting people, since they are able to communicate and share stories that bring them closer together. It has also divided, however, since people who speak a certain language can sometimes feel a sense of national or ethnic pride that leads to violence against people who speak other languages.
