835 - Dorestad plundered again

Low Countries
Vikings attacked the Frisian town Dorestad for the second time.
When the emperor Louis I the Pious arrived to Aachen, from a meeting in Lyon and heard about the attack he reinforced the coastal guard and then went on his yearly autumn hunting in the Ardennes forest.

England
The island of Sheppey, South East England was raided.
Wales
The West Welsh(Cornwall) were forming an alliance with the Viking raiders whom they allied with to fight against the Anglo-Saxon King Egbert of Wessex whom had defeated the Cornish at Gafulford in 823