Ívar RAGNARSSON (c. 794-bef873)

Ivarr the Boneless and his brothers are the founders of the Uí Ímair in Ireland - the clan or descendants of Ivarr. They are the sons of Ragnarr Lothbrok of Denmark, and they lead the first Viking army to invade mainland Britain in search of conquest rather than pillage. Landing in East Anglia, they ravage the kingdom for a year before heading into Northumbria in 866. That kingdom falls in 867 and a puppet king is installed. The Great Army moves south, campaigning during the spring and summer. East Anglia falls in 869, and the capital of Alt Clut is sacked in 870, with Olaf's help. Ynys Manau also falls to them in around 870, and between 870-871, Ivarr's brother, Bagsecg, is involved in the attacks, leading the Great Summer Army into England and adding his forces to those of Ivarr and Halfdan.

Bagsecg is killed at the Battle of Ashdown in Wessex in 871, after which Olaf returns to Norway, and the following year the Great Army is back in Northumbria. It winters in late 872 and early 873 at Torksey on the River Trent in Lindsey, before moving west into Mercia, which is defeated in 874 and a vassal king is installed on its throne. Later that year the army divides, with one half going to Cambridge and the rest heading towards the Tyne and eventually settling in York.