 With the authority of the Gallic emperor that he controlled, Gundahar settled on the left (Roman) bank of the Rhine, between the river Lauter and the Nahe, seizing Worms, Speyer, and Strassburg.Apparently as part of a truce, the Emperor Honorius later officially "granted" them the land, with its capital at the old Celtic Roman settlement of Borbetomagus (present Worms).Despite their new status as "foederati", Burgundian raids into Roman Upper Gallia Belgica became intolerable and were ruthlessly brought to an end in 436, when the Roman general Aëtius called in Hun mercenaries, who overwhelmed the Rhineland kingdom in 437.