Ivar the Boneless was the brother of which 9th century Viking chieftain?
Ubba Ubba, also known as Hubba, Ubbe, and Ubbi, was a mid-ninth-century Viking chieftain and one of the commanders of the Great Army, a coalition of Norse warriors that in AD 865 invaded the Anglo-Saxon kingdoms of Northumbria, Mercia, East Anglia and Wessex.
Battle at Herdaler The Battle at Herdaler was a battle between the Norse Viking leader Olav Haraldsson (later King of Norway) and Finnish people at Herdaler in Finland around years 1007/8. The Saga of Olaf Haraldson tells how Olav Haraldsson (Olaf II of Norway, also Saint Olaf), the King of Norway, plundered in Finland and was almost killed in the battle.