Posadan

Posadan is a planet which suffered the fate imposed upon it by Posadists. That is, following The Shattering and the shock that froze the Express, the isolated world of Posadan is seen by a growing and radical political group as the perfect setting for a destruction of society in order to usher in the ideal Communist society. As the years drag on, and as it becomes clear that the Express would not return, social order began to break down on Posadan and panic spread. Monopolizing in this decay, a prominent Posadist group attains control over nuclear weaponry and commits to strikes against major political centers over the entire planet.
Following the subsequent outrage against the Posadists, and moreover the apparent failure of the world revolution to occur, the Posadists, driven by impatience and fear of being overthrown, launch a secondary nuclear attack- this time expending their entire arsenal throughout the planet. By doing so, they had hoped to irrerrversibly destroy the institutions of the planet.
Instead, Posadan would become a tortured world, one where agriculture was difficult and technology had decayed. As the new reality of the world set in, a sort of techno-feudalism world would arise. Those who could control farmable land would become kings, in a sense, and would rent out said land to laborers. Meanwhile, in the majority of the world where agriculture was difficult, raider cultures would develop. Pastorialism would sustain them, although attacks on the settled groups, or sometimes outright invasions of their lands, were common occurrences.