After winning a great victory over the three challenging Orcish Hordes, Erich found himself with a massive increase in soldiers and personnel. Because of this, he retired back to a world on the borders of Imperial Space. It was a large continental world, with a similar climate to Earth.
However, it was not owned by any interstellar civilization, and was instead purchased by Tia to house and train the Orcs for the upcoming wars which they would wage against the Germanic Star-Empire and the galaxy.
While billions of Orcs waited for their new equipment and ships to be manufactured, they needed a place to stay. And the barren inhospitable wasteland which was used as an industrial world by an army of robots, was no place to house Orcs.