Battle of Lewes – Wikipedia

The Battle of Lewes was one of two main battles of the conflict known as the Second Barons’ War.It took place at Lewes in Sussex, on 14 May 1264.It marked the high point of the career of Simon de Montfort, 6th Earl of Leicester, and made him the “uncrowned King of England”. Henry III left the safety of Lewes Castle and St. Pancras Priory to engage the Barons in battle and was initially …

https://en.wikipedia.org/wiki/Battle_of_Lewes