What was the purpose of the 13th, 14th and 15th amendments?

the 13th amendment keeps people from keeping slaves. this is quite important because this would not give us liberty and justice and that is what the U.S.A stands for. the 14th amendment is important TO KEEP YOU ILLEGAL CROSSER'S BECAUSE THEN TERRORISTS COME AND THE PEOPLE WHO HAVE WAITED FAIRLY DON'T GET IN BECAUSE OF ILLEGAL PEOPLE CROSSING. *inhales* *exhales*  the 15th amendment allows black and other colored people to vote.

Hope this helps ;)

i also think he is correct. i believe they came to washington to protest their rights.