While the Horde and the Alliance enjoy a tenuous treaty of truces, they are in fact constantly fighting over territory. They vie for control of six strategic battlegrounds and constantly try to wrest control of these contested areas from each other. The areas as a result are constantly under contention and the citizens are under constant threat of war from the opposing faction.
In places where Horde and Alliance control are minimal, such as the Outlands or the continent of Northrend, each must fight for the favor of the powerful factions that exist in these locations. Each may have a base in these locations, but they do not control the area as such, but merely have a presence there. For this reason, there is a major city that is completely neutral sanctuary, where both factions may come together to fight a common foe. In the Outlands this foe is Illidan Stormrage and his forces at the Black Temple or Kael'thas Sunstrider and his forces at Tempest Keep and Sunwell Plateau. In Northrend its the influence of Arthas the Lich King at Icecrown and the Lich Kel'Thuzad at Naxxramus. The city in Outlands is called Shattrath, ruled by the Naaru and in Northrend it is Dalaran, ruled by the Kirin'Tor.
See below for info on these factions:
The Horde: Chieftains of Kalimdor
