884 - Peace ended

Gathering of viking ships
In autumn an army of Danish Vikings were defeated at the Battle of Norditi (Battle of Hilgenried Bay) on the  North Sea coast by a Frisian army under Archbishop Rimbert of Bremen-Hamburg, this led to permanent withdrawal of the Vikings from East Frisia.
King Carloman the second died in a hunting accident, and vikings started looting in West France, with the death of Carloman the second , the vikings considered that the peace treaty was canceled.
According to Beowulf, Snorri Sturluson's Edda and his Ynglinga saga, Saxo Grammaticus' Gesta Danorum, and the Grottasöngr Frode/Frodi became king of Denmark.