In my world of Drio the Khentet-Sah are a group of nomads living in the Savannas and mountains of Khentet-Sah. They travel by horse, zeebra and elephant and eat wild tubers, antelope, deer, and grasses found in their homelands. They do some trade with outside groups as well. They live in extremely well designed tents that keep out the wind, heat, and cold of these hostile places. A tribe of 100 people will tend to stay in one area for no longer that 6 months.
They live on a megastructure ruin drifting in space (on the only part of it that still has life support active for its biomes). Their orbital path is littered by debris from the megastructure falling back on it regularly, mostly on the unshielded part that the Vidiars live in.
Since the megastructure has been broken for a very long time, to them the meteorites are a natural part of life, deeply rooted in their culture just like the weather or astronomy is.
They have been declining for a few different reasons, chief among them the encroachment of other cultures from protected areas that were easier to survive in. Those had considerably less ground ressources available and are now hit full blast by scarcity. As a result they are forced to go get these resources elsewhere.
Given that they also have industrial bases in their homelands, it’s no fair match and the Vidiars are continually pushed back towards more dangerous areas.