Bring 3 Alterac Valley Marks of Honor to a Horde Warbringer outside the battlegrounds.
Listen up, [player]. No matter what you might have heard about the battle raging in Alterac Valley, one thing remains true: the Stormpike Expedition invaded Frostwolf Territory. The day we allow the Alliance to invade Horde lands without a forceful response is the day I hang up my axe and live the rest of my life in shame. Go forth and expel the invaders!