74. what led to the formation of the mongol empire?

Foremost, the Mongols produced a charismatic leader, Genghis Khan, who united the Mongol tribes in a dream of conquest and expansion.The Mongolian horse, a small and very tough infantry horse which could move very quickly and run long distances. Mongol troops were all horse-mounted and could move very quickly.The Mongol bow was a very small composite bow which could accurately shoot an arrow more than 200 yards. Combined with the fast-moving  horse mounted infantry, the Mongols had a great advantage.Mongol tactics focused on speed and mobility. If a city quickly surrendered, they were lenient, but if it resisted, they were ruthless.When necessary, the Mongols were willing to co-opt needed talent. For instance, when they needed to lay siege to a city, they would rely on Chinese siege engineers to lay siege to Baghdad. Compared to the empires they conquered, they weren't racist in how they used people.

The answer is professionals such as attorneys.