East Africa being Egypt, I'm pretty sure and it depends on what time period but the silk Road went right through east Africa so trade was probably really quick thanks to the silk road and the connection between the middle east and Africa...
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Abraham Lincoln | The White Househttps://www.whitehouse.gov › presidents › abraham-lin..
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read that it will help
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The cotton gin increased productivity in the US and enhanced the economy.
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Harriet Tubman is responsible for the Underground Railroad. She was the main conductor so to speak.