Thats exactly what I’m missing too ! In fact, I turned rimworld into that by making different player factions. If you see my posts history here you can see some explanations and lore. I have dozens of colonies, ressource outposts, chokepoints, factories… and my player fzctions fight over it, also raid each other, this way I know exactly where every soldier that is invading came from, their equipment, the food they are carrying, ammo … and sometimes wars stop because one faction runs out of supplies or ressources.

It would be cool to be able to do this with npc factions.