The Dark Planet that the Hunter-Gratzner crashed on. This planet is still in a state of eclipse and will be for another 14 years.
Two recovery teams were sent to investigate the crash and were both wiped out. A third was done and tactical nukes were deployed to clear the landing area to no avail. There were simply too many of the predatory creatures and the team was overwhelmed.
Finally robotic drones were deployed to gather info on the crash.