Having now established a secure perimeter, we have made ourselves relatively safe from enemy incursions. But against the seemingly random attacks by Planet’s native life only our array of warning sensors can help us, for the Mind Worms infiltrate through every crevice and chew through anything softer than plasmasteel.
– Lady Deirdre Skye, “The Early Years”
Being inside a building is, more often than not, an advantage when it comes to being on the defensive. The sheer presence of solid physical material between yourself and everything on the outside confers all sorts of advantages – warmth, the ability to organize your daily activities through specialized rooms, and of course the inability of things to enter in except through the door. Being thus sheltered from cold, chaos and calamity, you are ready to face the world on the occasions when you venture outside.
These advantages are all incidental, however, and differ from the sorts of protection afforded by constructions specifically built to create a difficult-to-conquer regions. Urban warfare is made difficult by the sheer fact that getting from point A to point B is difficult unless you already know the geography and can navigate the city streets. It is made a nightmare if the city is intentionally designed to include defensible positions, choke points and kill zones without cover. There is defense, and there is defense.
The Perimeter Defense represents an active investment in these kinds of intentional defensive architectural features. In a sense, it is the militarization of architecture. Given that life on Chiron is almost exclusively happening inside the built environment of bases, it by extension means the militarization of entire lifeworlds. Yang makes no secret of this, and intentionally built his bases underground specifically with this in mind. On Chiron, the dividing line between civilian and military endeavors is blurry at best. To quote from Virilio’s Bunker Archeology:
Anticipation and ubiquity are war’s requirements, and distance or prominent obstacles must not impede intelligence or reconnaissance. On the one hand, one must see all and know all, and, on the other, must create masks and screens infinitely tighter than any nature offered – than any of those we have dissipated or surpassed.
We can see this dual dynamic in Deidre’s quote. On the one hand the Perimeter Defense will defend against human enemies; on the other hand, only sensors can defend against Mind Worms. Defensive architecture will only take the colonists so far – the defense must go on the offense, as it were, and include anticipatory equipment that can see the enemy (be it human or worm) arrive from a distance. The effect of this is a society which at every point in time anticipates an incoming attack. Even when no attack is incoming, the preparations made for its eventuality has an effect on the present. It becomes part of the everyday mentality, even if it is rarely addressed explicitly. A base is a home, but it is also a bunker. By necessity, design, or both, that is the home the colonists built for themselves.