The answer is the the empire was conquered and exploited by Pizarro and other Europeans.
Byzantine empire i'm pretty sure
Freed slaves who wanted land available under the homestead act still faced the challenge of intense racism and segregation--meaning that they faced persecution and violence from whites who were in competition over the land.
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Question : Which explains why there is so little information about the Indus Valley civilization?
Answer : B. No one has been able to translate the writing of the Indus Valley civilization.