King Charles the Bald gives the order to build fortified bridges across the Seine and Loire Rivers, to protect Paris and the Frankish heartland against Viking raids. He hires the services of Weland, a Viking chieftain based on the Somme, to attack the Seine Vikings at their base on the Isle of Oissel. Weland besieges the Vikings—they offer him a huge bribe (6,000 pounds of silver) to let them escape.
Summer – Viking raiders led by Weland sail to England and attack Winchester (the capital of Wessex), which is set ablaze. He spreads inland, but is defeated by West Saxon forces, who deprive him of all he has gained.
↑Martínez Diez, Gonzalo (2007). Sancho III el Mayor Rey de Pamplona, Rex Ibericus (in Spanish). Madrid: Marcial Pons Historia. p.25. ISBN978-84-96467-47-7. JSTORj.ctt6wpw4q.