I have recently discovered more about the league system here in Deutschland. The Berlin Liga, or 6th tier, had been the lowest levels I had been able to find. Now, however, it is clear that the tiers go all the way down to 14. From roughly 7-10, maybe farther, are various ranges of what are called the Bezirksliga and the Kreissklasse, in that order. Because this is so far down on the food chain, I doubt that e scope of the leagues ranges anything past a single city or small cluster of villages near each other. Berlin is a big city, so it can warrant its own league, but when you get to the smaller areas, then you will have fewer teams in total.