The passage of the fifteenth amendment led to

The passage of the fifteenth amendment led to the establishment of long-awaited true political equality.

Explanation:

The Fifteenth Amendment that was done to the United States Constitution guaranteed the African Americans the right to vote in the elections conducted thenceforth. Before the passing of the Fifteenth Amendment, the blacks of the African Americans were deemed to be politically untouchable. The Fifteenth Amendment allowed blacks to choose their own representatives as it clarified that no one would be denied the right to vote based on race, color, or previous condition of servitude.