I deemed IMTU that Edinia/Vilis (also a Red Zone, IIRC) was a small rocky satellite to a small gas giant in a highly elliptical orbit, with large resevoirs of ice beneath the surface, so that when Edinia looped back toward the gas giant every nine years, the ice would warm up due to tidal stresses and blow out onto the surface. These were called the "Tides of Edinnia" and were considered, until the Fourth Frontier War, to be one of the most beautiful sights in the Spinward Marches.
IMTU, there was a large battle at Edinnia during the Fourth Frontier War largely involving Darrian Forces, but with a small contingent of Imperial forces (four of five escort vessels) - who encountered a large Zhodani task force. The Darrians used a derivative of the Star Trigger and destroyed the Zhodani force --- but burned off like 8 percent of the mass of the gas giant in the process. Edinia then had sufficient velocity to escape the gas giant and take its own orbit around Edinia's primary star. Thus ending this natural phenomena for good...
The Red Zone is just an effort to cover up this event, nothing more.
Much of the campaign involved my character's relations with one of the few survivors of the Imperial force... who knew something about the Darrians that he shouldn't... and something the Imperials didn't want out in the open either.
Part of the intrigue involved Darrian and Imperial efforts to partition the Sword Worlds and the Border Worlds in the aftermath of the FFW... in 1110.
