Answer:
The Industrial Revolution sweeping across Europe and America in the late 18th century.
Explanation:
The south fought the civil war because they tried to secede from the union after Abraham Lincoln was elected
World War II occurred as a result of several factors, including (but not limited to) Nazi Germany's aggressive military and industrial expansion, as well as Japan's foreign policy in Asia and Italian Facism.
They grew crops, and started expanding, turning more colonies around into bigger ones, to eventually create the whole 13. They were still under persecution from England, so eventually, they decided to come together and form their own government, and write the constitution.
