The 15th Amendment to the United States Constitution was ratified on February 3, 1870, and it granted African American men the right to vote. This amendment was a significant milestone in Black history as it officially prohibited the denial of voting rights based on race, color, or previous condition of servitude.

Despite the passage of the 15th Amendment, many states implemented discriminatory practices such as poll taxes, literacy tests, and grandfather clauses to prevent African Americans from exercising their right to vote. It wasn't until the Voting Rights Act of 1965 that these barriers were effectively dismantled, leading to greater voter registration and political participation among African Americans.

The 15th Amendment marked an important step towards equality and civil rights for Black Americans, but it was only the beginning of a long struggle for full political and social rights.