After Archimonde's defeat at the Battle of Mount Hyjal, there were several demonic forces still scattered across Azeroth. Some remained unaware of the defeat of their masters. Many of the dreadlords in Lordaeron in particular did not know of what had unfolded across the sea, despite a span of many months. However, without Archimonde, the dreadlords were exposed. Arthas drove them away, for the time being. Unfortunately for him, the Lich King was growing weaker. Control over the Scourge was lost, for the most part. The Dreadlord Insurgency lives on in the form of the Risen (organization).