Having already been in conflict with the French king (Burgundy had sided with the English in the Hundred Years' War), Charles' advances along the Rhine brought him in conflict with the Habsburgs and especially emperor Frederick III.
Budući da je već bio u sukobu s francuskim kraljem (Burgundija je bila na strani Engleza u stogodišnjem ratu), Karlov napredak duž Rajne ga je doveo u sukob s Habsburgovcima, a osobito s carem Fridrikom III.