902 - Vikings driven out of Dublin

Ireland
Irish kings Cerball mac Muirecáin King of Leinster and Máel Findia mac Flannacáin King of Brega attacked the vikings in the longphort Ath Cliath (Dublin) from the north and the south, and they drove the vikings out of the area.
Wales
Ingimundr and the defeated Dublin Vikings sailed across the sea to Wales. They were opposed by Welsh forces under the command of either Hywel ap Cadell ap Rhodri Mawr or his brother Clydog, driving the Norsemen into the vicinty of Chester.
England
On December 13 the Anglo-Saxon army in Kent defeated the Vikings of East Anglia at the Battle of the Holme. Æthelwold ætheling was killed during the battle and the rebellion against Edward the elder stopped.