I was about to suggest something quite different, but was turned down by the overall Military-A/H-Bomb aura.
Anyways; I cannot help but think of something on the creative and aesthetic side of things rather than even remotely related to destruction. That is Arcady and Boris Strugatsky and the legendary Solaris and A Roadside Picnic, and their phenomenal, cult visual representations by A. Tarkovsky. IMHO something deserving far more acknowledgment than the military.
EDIT: Sorry, should have mentioned his name as well - S. Lem
So why not something like "The Zone" or just "Zone". Or some of the more esoteric anomalies in the Zone. And in that logic, the GUI could be something like perforated and battered (or not) rusty metal texture, with a gradient blueish colour filter (or not, dependent on the colour scheme) on top of it - in a way making it look like one of the artifacts left by the Visitors, or even an unmentioned one - photo-realistic and retro-соц.-futuristic
Btw " +1 for Perimeter, suits well this hypothetical scenario.
Hope no one got offended by the commentaries.
All the best
CC
