854 - King Horik was killed

C.Deleuran Horik 2 (Erik Barn) king of Denmark 854
Denmark
Rorik and Godfrid Haraldsson was some of king Horik`s relatives, they returned from a viking raid in Frisia, their intention was to throw Horik of the throne, and under the violent battles - King Horik and most of the Danish royal family was killed. Rorik and Godfrid were defeated an fled to Frisia. A young boy became the new king his name was Horik 2 or Erik Barn.
The Earl of Hedeby banned Church bell ringing
Earl Howi took action against the church in Hedeby, he chased the Christian priest away and stopped all church activity. The new young king Horik 2(Erik barn) would like to maintain the good relationship with Ansgar and earl Howi was therefore sacked and the church was reopened and could also ring the church bells. Horik 2 showed more goodwill so a church was built in Ribe.
Ribe loot 800 AD
England
The Viking chieftain Ubbe set up a base camp at Milford Haven with 23 ships. A new overwintering camp was set up on the Isle of Sheppey,  Kent
France
Vikings sacked Blois but were repulsed at Chartres and Orleans by  an army led by bishop Agius.
Lothar and Charles the Bald agreed to take measures to secure the coasts against viking raids.
Latvia
A fleet of Danish ships attempted gather the tribute from Grobina(Seeburg), but was defeated.
Olof  of Sweden raised an army and tried to capture the former viking colony, in the process vikings destroyed a place that Rimbert called Seeburg, Grobina. The town had 7,000 armed men to protect it, but the town was pillaged, and burnt by the Swedes.
Orkney Islands
Ketil Flatnose continued his conquest of the Pictish kingdom of Dalriada.
Viking raider
Portugal
Muslims captured 2 viking ships at the coast outside Portugal.
Wales
Welsh Annals recorded that Vikings were referred to as Y Llu Du attacked Môn.