What other ways might states find to deny African Americans the right to vote under the Fifteenth Amendment?

A terrible and bloody Civil War freed enslaved Americans. The Fourteenth Amendment to the Constitution (1868) granted African Americans the rights of citizenship. However, this did not always translate into the ability to vote. Black voters were systematically turned away from state polling places. To combat this problem, Congress passed the Fifteenth Amendment in 1870.

that's my idea

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.