The Snyder Act of 1924 enabled Native Americans born in the United States full citizenship. The 15th Amendment, passed in 1870, granted all U.S citizens the right to vote but it was the Snyder Act that enabled Native Americans to vote.
When I see stuff like this, it enrages me beyond anything else because how are you gonna kill and rob and take from an entire race of people. Then say you found everything then NOT give them citizenship of their own land.