Battle of Radcot Bridge
1387 CE.
Shown on the map at 51.693°, -1.589°.
The Battle of Radcot Bridge was fought on 19 December 1387 in medieval England between troops loyal to Richard II, led by court favourite Robert de Vere, Earl of Oxford, and an army captained by Henry Bolingbroke, Earl of Northampton. It took place at Radcot Bridge, a bridge over the River Thames, now in Oxfordshire, but then the boundary between Oxfordshire and Berkshire.
Text from the Wikipedia article Battle of Radcot Bridge, licensed CC BY-SA 4.0.