Azeroth

Azeroth is a planet that featured in an April Fool's joke by Blizzard Entertainment. As such, it should not be taken as canon.

Overview
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.

Trivia
Azeroth is named after the same world of Azeroth in StarCraft's counterpart francise of Warcraft. That however, is where the similarities end...