Hi all first time contributing, hope this isn't a repost!
You need to have the quest "Battle Before the Citadel" which can be obtained from the Argent tournament grounds.
Head south of Icecrown and mount on the Stabled Campaign Warhorse with the Argent Lance equipped, then just FACEROLL all the Bonegaurd Footman by running over them with the Warhorse. (They die instantly)
[IMGL]http://img685.imageshack.us/img685/4311/icecrownmap.jpg[/IMGL]
[IMGL]http://img502.imageshack.us/img502/1600/lovelycharm.jpg[/IMGL]
Enjoy ^_^