Complete the "Blood in the Snow" scenario. You can queue from the Dungeon Finder or use Lorewalker Cho's Dream Brew.
I am glad you are here, <name>. I have been using my dream brew to experience events around the world, but the more I learn, the more confused I become.
For instance, King Wrynn has asked the dwarves of Ironforge for more troops, but they do not all support him.
I will tell you more, but I would also like to hear from your experience firsthand...