What factors caused the fall of the mongols' empire?

The mongol empire fell for many reasons including poor leadership following the death of Kublai Khan The rulers spent money unwisely making them raze taxes which in turn led to riots throughout the mongol empire. This led to the empire to getting smaller and smaller .The empire was also in so much debt and this led to riots and fall of the empire

the completion of the erie canal spurred the first great westward movement of american settlers, gave access to the rich land and resources west of the appalachians and made new york the preeminent commercial city in the united states.

d: their own individual powers within the new goverment