All the major guild studios went crazy farming demons.
On the Redridge Coast, Overlord Blade Ruthless led the Horde to ambush the Demon Army. He personally joined forces with Grommash Hellscream and his son, and successfully slew Mannoroth. Grom Hellscream even re-enacted the famous scene of leaping and cleaving Mannoroth.
At the Lordaeron harbor, under the illumination of the Holy Light from the Golden Tree, the Order of the Silver Hand broke through the demons' lines. Gedwyn, together with Uther, forcibly killed Kazzak amidst a sea of enemies.
And on Death Beach, Varian solo-killed Tichondrius with the deathly blade of Frostmourne piercing Tichondrius's heart.
In less than a week, all three expeditionary forces sent by the Burning Legion were annihilated.