Amendment 15 is about races being a part of votes and only some races could be able to vote. A real life example would be when it depended on the state you lived in and that's when some states would permit women to vote and free black men.Another example would be now in days you have to be 18 and older in order to vote. In addition, in California in order to vote you have to be born here and need to be the right age.Americans didn't allow any colored skin or women to vote. The people had to be over 18. Also, black people was one of the main race to not be able to vote. In conclusion, this is what the fifteenth amendment was about.