The Civil War.
The Dred Scott decision is a shameful decision that rightfully angered abolitionists, deepened divides, and helped lead to the Civil War.
the answer to this question is c, your welcome ;)
It was the Mamluks. A Mamluk was a soldier who converted to Islam, and over the time that the military used, they became stronger and more powerful military. This was the only way and the only war that the Mongols lost.