Answer:
The Japanese Attack on Pearl Harbor and Germany's aggression and unrestricted submarine warfare sinking U.S. Ships.
Explanation:
I believe the answer is:
- Pure mathematics
Proven by the difference in knowledge on astronomy between aztec culture and the Castillian.
- Urban architecture
Proven by the superior irrigation system that Aztec civilization had compared to Castilian civilization at that time.
Most blacks do not want to go to Africa during the colonization movement because they had been born in the United States and had little in common with Africans.
As you can see Africa and United States were different if I'm not mistaken the U.S used Africans as slaves back in the day so that could probably explain a lot.
Hope this helped :)
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Hwrbet Hoover was the president at the start and was followed.by Franklin D. Roosevelt
The colonists called it the French and Indian War, and it permanently shifted the global balance of power. By the mid-18th century, both the British and French wanted to extend their North American colonies into the land west of the Appalachian Mountains, known then as the Ohio Territory.