Explain how the expansion of empires influence trade and communication in the trans-saharan

This was an order issued during the civil war by president lincoln ending slavery in the confederate states

What do you think was a drawback to this method of calculating distance

Which landmark supreme court case ruled that segregation by race in public education was unconstitutional? a.miranda v. arizona b.plessy v. ferguson c.brown v. board of education of topeka d.alexander v. holmes county board of education