For 10 points, name these Norse seafarers who traveled on longships and went through Europe raiding and pillaging.
In the Treaty of Saint-Clair-sur-Epte, Charles the Simple conceded Normandy to a group of these people under Rollo in exchange for an oath of fealty. One group of these people under Rurik ruled the Kievan Rus after capturing Novgorod. The poem The Battle of Maldon relates an attempt to fight off a group of these people, whose first major incursion on the British Isles occurred in Lindisfarne in 793. These people included Ivar the Boneless and a group of them under Harald Hardrada were defeated at the Battle of Stamford Bridge. For 10 points, name these Norse seafarers who traveled on longships and went through Europe raiding and pillaging.
In the Treaty of Saint-Clair-sur-Epte, Charles the Simple conceded Normandy to a group of these people under Rollo in exchange for an oath of fealty.
Vikings [or Varangians; prompt on ethnic terms like \"Danes\" or \"Scandinavians\"]