Why do you think it might have been necessary for the Union to have African American soldiers? (Write at least a paragraph)

it was important for both the African Americans and the Union soldiers that they fight alongside one another. Since the war was an ideological one, largely because of slavery, their fighting as equals could be a morale boost in both cases. The freeman also got to fight for the freedom of their people.

Explanation:

i think it is a system for harvesting crops more easily

"a government in which power is divided between state and national levels". federalism is a system of government in which entities such and state and province, share power with the national government.