I found this youtube video that goes through the whole history of the horde, starting with Ner'zul. I quite enjoyed watching it even though its over 50 min long.
Could be useful for some of those who dont know a lot of lore!
http://www.youtube.com/watch?v=NdqEmi1GbsE&feature=related
Could be useful for some of those who dont know a lot of lore!
http://www.youtube.com/watch?v=NdqEmi1GbsE&feature=related