4. How did the women being spies during the Civil War help both sides?

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Belle boyd was a famous confederate spy. Elizabeth van lew helped the other side, the unionists, create an underground network to hinder the Confederate war effort and give aid and comfort to captured Union soldiers. Also, Pauline Cushman was known for her loyal servie to the Union side and found out critical information about the other side to help win the war.

Explanation:

explanation:

the addition to geographic boundaries that might have  kept the people of the huang river civilization from traveling to far distance region is that they had learned about the other river valley civilizations but feared contact would bring invasion.

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