Economic distress and resentment of the treaty within Germany helped fuel the ultra-nationalist sentiment that led to the rise of Adolf Hitler and his Nazi Party, as well as the coming of a second World War just two decades later.
Answer:
Mountains during the spring time would melt and the water fallen from the miountains would greatly affect Europe resources during the Middle Ages
The US proved that it had the industrial strength and man power to become a world power
Generally speaking, "assembly line jobs" did not represent an obstacle during this time, since this in fact increased productivity through the "specialization of labor".