Reign of Chaos tells the story of the Burning Legion's attempt to conquer the fictional world of Azeroth with the help of an army of the Undead, led by fallen paladin Arthas Menethil. It chronicles the combined efforts of the Human Alliance, Orcish Horde, and Night Elves to stop them before they can corrupt the World Tree.
The Frozen Throne continues the story of the corrupted death knight Arthas Menethil as he goes down the dark path of becoming the Lich King.
