That no one country could have a sphere of influence to trade in China- so the U.S. would have equal access to trade.
Answer:
Along the coast of North Africa sea port cities developed such as Marrakesh, Tunis, and Cairo. The port city of Adulis on the Red Sea was also an important trade center. The major trade routes moved goods across the Sahara Desert between Western/Central Africa and the port trade centers along the Mediterranean Sea.
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