Earthguard was established in 2134 by the Hierarchy as occupational force in the Sol system. It comprised Ilwrath and Spathi ships and a Moon Base command post on Luna. Following the fall of Earth in 2134, the Ur-Quan opted to leave a larger than usual garrison to enforce the Oath of Fealty because of the Human's aptitude for tenacity and cunning, the central role they had played in the Alliance of Free Stars, as well as their homeworld's abundance in natural resources and industrial capacity. The Ilwrath and Spathi were the nearest Battle Thralls to Human space.