Battle of Evesham 1265 in county of Worcestershire
The Battle of Evesham on 4 Aug 1265, was the decisive royalist victory in the Barons War. Prince Edward, later Edward I by fine military leadership defeated the Montfortians before they could properly mobilise and unite. Edward surprised Simon de Montfort’s son by a dawn attack on 2nd Aug at Kenilworth, followed by a night march over 3rd/4th Aug trapped Montfort.
Evesham was an unusually savage battle, the Montfortians were outnumbered and slaughtered, Simonde Montfort himself was killed and his body mutilated.
For more details about this particular Battle, see the Evesham entry on the Battlefields Trust excellent detailed site here