<span> The establishment of the League of Nations</span>
The North had a better economic than the South, so the North had more troops to fight the war. The North had railroads, steamboats, roads, and canals for faster transport of supplies and troops.
Answer:
This happened since Mongols were nomads, meaning that they didn’t have any home because they were always traveling. This caused a huge expansion, because they were always raiding settlements and stealing food and valuables.
Explanation: