881 - Vikings raided Bonn and Cologne

Viking ship 9th century
Bardr mac Imair"Viking Tyrant" died after a raid on St. Cianan monastery
Battle of Saucourt-en-Vimeu,  by Jean-Joseph Dassy
The Frankish army from Ghent started to move. King Louis of West Francia won a battle the 3rd August against the vikings at Battle of Saucourt-en-Vimeu south of the Somme river.

The victory had no effect, vikings continued to raid Bonn and Cologne and they controlled large land areas, they made a base at Elsloo. Gudrød captured the Frankish royal town of Nijmegen.