what was the significance of the fifteenth amendment?

it outlawed slavery in the united states resulting in the freedom of thousands of slaves.
all citizens were granted the right of free speech.
the production and consumption of alcoholic beverages was prohibited.
it granted african american men the right to vote.

The significance of the fifteenth amendment is that it granted African American men the right to vote. It was an important step towards ensuring equal civil rights for African Americans after the Civil War. However, it did not guarantee that all African Americans could exercise this right, as many faced various discriminatory practices such as poll taxes, literacy tests, and violence.