Answer:
The Mongol invasion of Central Asia occurred after the unification of the Mongol and Turkic tribes on the Mongolian plateau in 1206. It was finally complete when Genghis Khan conquered the Khwarezmian Empire in 1221.
Explanation:
The British learned that the Continental Army had the potential to win the Revolution, due to the significant casualties that the inexperienced colonies caused to the British Army.
Because he needed money to fund his wars of conquest in Europe. One of the terms of the Louisiana purchase was that the U.S had to pay it upfront with gold.
John Fremont's ability to draw accurate maps was a talent. The map of the Great Basin was what "changed the entire picture of the West". His maps after 3 expeditions were used by thousands of people moving West.