De Montfort gained an advantage early on.In May 1264, he secured a brilliant victory in the battle of Lewes by defeating the Royal Army and capturing both King Henry III and Prince Edward.

• 早期德蒙特福取得优势，在1264年的五月，他在路易斯之战藉著击败了王军巩固了辉煌的胜利并掳获了国王亨利三世和爱德华王子。