900
- 915 Ealdred I of Bernicia and Constantine II of Scotland are defeated by Vikings in the first Battle of Corbridge.
- 927 Earldom of Northumbria is created by Athelstan.
- 937 Athelstan defeats Norse-Celtic force in the battle of Brunanburh.
- 954 Edinburgh is lost to Scottish king Indulf.
- 995 Monks from Lindisfarne establish Durham
Read more about this topic: Timeline Of Northumbria And Northumberland