Tirion fails to shatter Frostmourne and the Lich King succeeds in corrupting the greatest warriors of the Ashen Verdict's forces into his new generals of the Scourge. WotLK's follow-up expansion concerns his new march into Kalimdor and the Eastern Kingdoms, with the Horde and Alliance having to put aside their faction-related strife after the events of the Wrathgate and try to work together to halt his advance.