Fifteenth Amendment (1870)

Section 1. The right of citizens of the United States to vote shall not be denied or abridged by the United States or by any State on account of race, color, or previous condition of servitude.

Section 2. The Congress shall have power to enforce this article by appropriate legislation.

The Fifteenth Amendment protected the African American citizen's right to vote. It also gave Congress the authority to enforce the amendment through legislation.  

This picture documents some African Americans' first vote after the ratification of the 15th Amendment. http://www.loc.gov/rr/program/bib/ourdocs/15thamendment.html

This rap written and sung by these girls is really creative. They sing about exercising their 15th Amendment right.