Answer:
Japan did not allow trades to western countries.
Explanation:
Weapons in WW1 were being mass produced and of a greater quality than those of wars before. Barbed wire, airplanes, poisonous gas, submarines etc were introduced which revolutionized war today. Trench warfare was countered and is no longer used to fight.
It became known as the reconstruction era of the south
It provides the social and economic conditions that surround it
