High Quality Content by WIKIPEDIA articles! The fantasy setting of the Warcraft series includes many fictional races and factions. Most of the primary protagonists of the series belong to either the Horde or the Alliance, however there are a variety of neutral races and factions, who either friendly or hostile to both the Horde and the Alliance. By the time of Warcraft III the Horde and the Alliance both fight against the Burning Legion and the Undead Scourge, who are the primary villains of Warcraft III and World of Warcraft. By the time of World of Warcraft, the Alliance and the Horde are not engaged in all out war any longer, however they still are hostile towards each other and skirmishes between the two sides occasionally erupt.