Gallia Belgica
Eventually, in 406, a large alliance among them [[Vandals]], [[Alans]] and [[Suebi]], under great pressure from the [[Huns]], after first having been defeated by the Ripuarian Franks in the neighborhood of Cologne in Germania Inferior, successfully [[Crossing of the Rhine|crossed the Rhine]] in the neighborhood of present-day [[Koblenz]] and entered Gallia Belgica by way of the Moselle valley. They subsequently destroyed large parts of Gallia Belgica, before eventually moving on to [[Hispania]] (present-day [[Spain]]). This invasion and the accompanying widespread destruction broke the backbone of Roman power in at least the northern part of Gallia Belgica. After this invasion the Franks were able to conquer valuable agricultural land south of the [[Via Belgica]], the very important main road between Cologne and Boulogne, that had been the backbone of Roman defense strategy between 260 and 406.