An English fleet defeats a French fleet in the battle of Sandwich, cutting off Prince Louis of France from supplies and diminishing his hopes to gain the English throne during the First Barons' War.

The Battle of Sandwich, also called the Battle of Dover took place on 24 August 1217 as part of the First Barons' War. A Plantagenet English fleet commanded by Hubert de Burgh attacked a Capetian French fleet led by Eustace the Monk and Robert of Courtenay off Sandwich, Kent. The English captured…