2. The Congress shall have power to enforce this article by appropriate legislation."
The fifteenth amendment guaranteed all citizens the right to vote, regardless of their color. This allowed black men to vote. Voting privileges were still denied to women of any color at this point.
Actively fighting for their right to vote, these black men earned the right to vote through the fifteenth amendment.
Although black men earned the right to vote, women were still prohibited from doing so. This sign was one many women activists carried around, stressing the importance to earn voting rights for themselves.