Their planting seasons probably had to do a lot with when they thought their gods changed the seasons.
Idk if this is the event its asking for but: The “Red Summer” of 1919 marked the culmination of steadily growing tensions surrounding the great migration of African Americans from the rural South to the cities of the North that took place during World War I.
Answer: It sped up the manufacturing dramatically, It allowed factories to produce more products at a faster rate. It had also reduced the labor hours benefiting workers.