They were captured and inslaved
"Ulysses S. Grant became a colonel in the Union volunteer army. His first victory was when he captured Fort Henry and Fort Donelson in February 1862. Also this man opened two rivers, and received national recognition for victories in February 1862, the first major Union victories of the war."
The Great Migration<span> was the movement of 6 million African-Americans out of the rural Southern United States to the urban .</span>
Such groups include hunter-gatherers, pastoral nomads (owning livestock), and tinkers or trader nomads. In the twentieth century, population of nomadic pastoral tribes slowly decreased, reaching to an estimated 30–40 million nomads in the world as of 1995.
Balance
It is the tendency of the social system, when disturbed, to return to its original state. This is because change in one element is often accompanied by changes in other related elements.