Azeroth is a planet that featured in an April Fool's joke by Blizzard Entertainment.
Azeroth is an obscure planet which features a wide selection of humans, mutants, and aliens in a state of perpetual superstition and conflict. Notably, it is the homeworld of the tauren, who caught the attention of the Terran Confederacy.
StarCraft II: Tauren Marine. Accessed on 2008-01-04