while the statement seems ludicrous and in many ways is, there is always some truth. The vikings who invaded England were not a single race they were made up of exiles of all sorts of kingdoms, as is usually the case with pirates. Vikings means Sea Pirate raid. The countries of origin of these sea pirates would have been mainly Scando and surrounding areas though these people have accounts of venturing down to Spain and Morocco etc one can only imagine them hiring mercenaries or purchasing warrior slaves. Also Similar to years later when all the "vikings" home countries Iceland, Norway etc where being raided by Barbary pirates in the time of the Ottomans with mixed muslim Turkish, British, Euro crews involved.