Franks
From their heartland, the Franks gradually conquered most of Roman Gaul north of the Loire valley and east of Visigothic Aquitaine. At first they helped defend the border as allies; for example, when a major invasion of mostly East Germanic tribes crossed the Rhine in 406, the Franks fought against these invaders. In the region of Paris, Roman control persisted until 486, a decade after the fall of the emperors of Ravenna, in part due to alliances with the Franks.