Battle of Heavenfield
634 CE.
Shown on the map at 55.020°, -2.100°.
The Battle of Heavenfield was fought in 633 or 634 between a Northumbrian army under Oswald of Bernicia and a Welsh army under Cadwallon ap Cadfan of Gwynedd. The battle resulted in a decisive Northumbrian victory. The Annales Cambriae (Annals of Wales) record the battle as Bellum Cantscaul in 631. Bede referred to it as the Battle of Deniseburna near Hefenfelth.
Text from the Wikipedia article Battle of Heavenfield, licensed CC BY-SA 4.0.