The Battle of Brunanburh was a significant conflict fought in 937 AD in what is now northern England. It involved an alliance of the kingdoms of Scotland, Wales, and Ireland against the forces of King Athelstan of England. This battle was crucial in establishing Athelstan's dominance over the British Isles and solidifying the unification of England. The battle is noted for its scale and the diverse forces involved. Athelstan's victory at Brunanburh is often seen as a turning point in British history, as it helped to secure the future of the English kingdom and deter further invasions from the north.