Answer: The fifteenth United states amendment had a good impact on the African American population. This 15th Agreement granted African American men the freedom to vote by stating that "the right of people of the United States to vote shall not be restricted or abridged by the United States or any State for reasons of race, colour, or prior condition of servitude."
If you look at the years of the states and write down the ones in 1889 and 1900, it gets easier. Three that I got were Wshington, Montana, and South Dakota (I'm sure there are more but those were three).
