The "Battle of Brunanburh" is an Old English poem. It is preserved in the Anglo-Saxon Chronicle, a historical record of events in Anglo-Saxon England which was kept from the late ninth to the mid-twelfth century. The poem records the Battle of Brunanburh, a battle fought in 937 between an English army and a combined army of Scots, Vikings, and Britons. The battle resulted in an English victory, celebrated by the poem in style and language like that of traditional Old English battle poetry. The poem is notable because of those traditional elements and has been praised for its authentic tone, but it is also remarkable for its fiercely nationalistic tone, which documents the development of a unified England ruled by the House of Wessex.