874 The great danish army split up

 
England
The great danish army was split up in 2 parts. Halvdan took his army and went to Northumberland where he was recognized as a king. In the Scottish borderlands Halvdan had to fight against 2 fearless tribes the Picts and the Gaels. The second part of the viking army was under command of Gudrum, Oscytel and Anwynd and that army went southeast and made a winter camp in Cambridge.

Danish vikings in Mercia forced the king Burhred to resign and installed Ceodwulf, whom they later sacked and took complete control of the Angles area.

Iceland
Norwegian vikings had started to immigrate to Iceland. And Ingolfur Arnarson founded Reyjkavik.

Ireland
Went into the "forty years rest" period from 874-914
Scotland
Amlaíb Conung, King of Dublin, was killed in Scotland on a campaign against Causantín mac Cináeda.