Battle of the Standard
1138 CE.
Shown on the map at 54.367°, -1.450°.
The Battle of the Standard, sometimes called the Battle of Northallerton, took place on 22 August 1138 on Cowton Moor near Northallerton in Yorkshire, England. English forces under William of Aumale repelled a Scottish army led by King David I of Scotland. King Stephen of England, fighting rebel barons in the south, had sent a small force (largely mercenaries), but the English army was mainly local militia and baronial retinues from Yorkshire and the north Midlands. Archbishop Thurstan of York had exerted himself greatly to raise the army, preaching that to withstand the Scots was to do God's work. The centre of the English position was therefore marked by a mast (mounted upon a cart) bearing a pyx carrying the consecrated host and from which were flown the consecrated banners of the minsters of York, Beverley and Ripon: hence the name of the battle.
Text from the Wikipedia article Battle of the Standard, licensed CC BY-SA 4.0.