Arnulf of Carinthia
Ragnar Lodbrok's sons Sigurd Snake-in-the-Eye, Björn Ironside and Hvitserk had raided in France and after Björn had gone home to Sweden, his brothers were attacked by emperor Arnulf of Carinthia. In the battle 100,000 Danes and Norwegians fell, including Sigurd Snake-in-the-Eye and king Guðrøðr.