6) this was the large movement of african americans from the southern u. s. to the northern u. s. in the early-20th century.

This was called The Great Migration.

the great migration

Explanation:

it took two men to wrestle rome back from chaos and turn a republic into an empire. in the first century bc, rome was a republic. power lay in the hands of the senate, elected by roman citizens. but the senators were fighting for power between themselves.