The Battle of Cranto IV started when members of several species felt they were being treated unfairly by humans and other species. They invaded the Cranto star system, specifically Cranto IV, and attempted to take over several bases used by the Futuron corporation. The space police in that quadrant sent a military unit to the planet and engaged the aliens there.
A door leading further into the base (I probably should have moved this forward to show some of the tunnel going back...)
Originally I was planning this to take up 4 large baseplates, including more of the Futuron base and lots more aliens and humans fighting, etc, but I was unable to get enough parts and baseplates to do the rocky effect everywhere. Eventually I might try to extend it if it isn't taken apart by then.