Final answer:
The Fifteenth Amendment was ratified in 1870 and it granted voting rights to freedmen.
Step-by-step explanation:
The Fifteenth Amendment was ratified in 1870. This amendment to the U.S. Constitution states that the right to vote cannot be denied or abridged by the United States or any state on account of race, color, or previous condition of servitude. It was the last of the Reconstruction amendments and aimed to provide voting rights to freedmen.