A nanotechnological structure, it was designed to retain a human-breathable atmosphere over a section of the Martian surface. The wall would expand in radius slowly, with the goal of eventually encompassing the entire planet. A circular ring composed of a wall hundreds of meters thick at its base and tapering off to microns wide towards its two hundred kilometer height, it was designed as a shortcut to the otherwise centuries-long terraforming methods. The massive wall trapped a livable atmosphere, with the walls themselves slowly expanding outward at a rate of twenty kilometers per year, widening the living space.
Unfortunately, the wall was damaged during the Coalition-Conjoiner War. After being crippled by the Coalition for Neural Purity, the wall's self-repair systems were directed manually by Felka, a young Conjoiners with savant-like abilities.
It was eventually destroyed fifteen years later during the Coalition's assault of the Conjoiner remnant.