A sci-fi series I used to listen to, Undying Mercenaries, had a galactic setup like that, where each species had something they produced while also being limited to one solar system, rules dictated by the galactic empire, who also had hostile neighbors in the Milky Way.
A sci-fi series I used to listen to, Undying Mercenaries, had a galactic setup like that, where each species had something they produced while also being limited to one solar system, rules dictated by the galactic empire, who also had hostile neighbors in the Milky Way.