In the Battle of Sandwich on 24 August 1217 a Plantagenet English fleet commanded by Hubert de Burgh attacked a Capetian French armada led by Eustace the Monk and Robert of Courtenay. The English captured the French flagship and most of the supply vessels, forcing the rest of the French fleet to return to Calais. The naval battle took place off Sandwich, Kent on the English coast during the First Barons' War.