845 Paris is sacked by Viking raiders, probably under Ragnar Lodbrok, who collects a huge ransom in exchange for leaving.
991 Battle of Maldon: the English, led by Byrhtnoth, Ealdorman of Essex, are defeated by a band of inland-raiding Vikings near Maldon in Essex.
1014 Battle of Clontarf: Brian Boru defeats Viking invaders, but is killed in battle.