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 armada led by Eustace the Monk and Robert of Courtenay off Sandwich, Kent. The English captured the French flagship and most of the supply vessels, forcing the rest of the French fleet to return to Calais.