Voldemort's D.A.D.A Curse Explained

How did Lord Voldemort go about cursing the Defence Against the Dark Arts teaching job so that no one could fill the position for more than a single school year? And what was his ultimate goal? Make sure to like our Facebook page www.facebook.com/mischiefmanagedyoutube Deep Space by Audionautix is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/...) Artist: http://audionautix.com/