What term is used to describe a region just beyond or at the edge of a settled area

The right term that is used usually to describe a region just beyond or at the edge of a settled area is a Frontier, because in that context, a frontier is a place or imaginary line that limits a region, territory, location, city or a country extension, and where sometimes the frontiers are located further or at the border of a settled area.

your answer is

to dominate europe

and i know for a fact it can't be the others

ghana achieved independence peacefully, while algeria gained independence through an armed struggle.