One group can be African Americans. Racist states found ways to prevent them from voting by imposing things like laws that force you to take a literacy test or similar. They also forbade them from working like regular workers by introducing the cropsharing system.
Another can be women. Women had been fighting for their political rights since before the war began. After it ended, they were still not given voting rights which lasted up until 1920s. Many women objected how African-Americans could be given voting rights and women
Third group can be Native Americans. After the war ended, the country could then start spreading westwards which had to be halted due to the war. More states began being added and this meant that Natives would have to move to reservations and their rights and land were being taken from them.
Weakened by subsequent and frequent attacks, and cut-off from international trade of salt, gold, and other important things, the kingdom was vulnerable and unable to prevent defeat. In 1240 C.E., Ghana was conquered and absorbed/added into the growing nation of Mali, which would soon become the next great empire.
After Mansa Musa died, his son Maghan took the throne. Maghan was a weak ruler. Raiders from the southeast poured into Mali. Mali neverfully recovered from the attack. The Malian Empire continued to weaken and decline after.This soon lead to the uprise of the new empire Songhai,which would be the new and powerful empire after Mali had fallen.
It's the sort of a line drawn on most of the maps. It can be between countries, cities-- almost anything that is not natural.
