Fringe Worlds

From the Encyclopedia of Speculative Fiction - http://encyclopedia.wizards.pro

Fringe Worlds comprise a belt at the farthest reaches of the galaxy's inhabitable planets. The inhabitants of these planets are generally poorly educated and isolationist; they were used as sources of cheap labor by the Terran Confederacy. Many of them follow old Earth religions or new cults as a way to escape their dreary existence. They are looked down upon by other Terrans, even those from Umoja and the Sons of Korhal. According to StarCraft: Uprising, the first Terran planets to be visited by the Zerg were a number of Fringe Worlds. The Terran Confederacy exterminated the inhabitants of the infected planets with genetically engineered plagues, claiming it was a cholera outbreak.