and representatives of Henry and Simon traveled to Paris. On 23 January 1264, Louis declared in the Mise of Amiens that Henry had the right to rule over the barons, thereby annulling the Provisions of Oxford. However, the French decision was unpopular; upon Henry's return to England unrest brewed and violence became imminent.

The Second Barons' War finally erupted in April 1264 when Henry's army occupied Simon's territories in the Midlands and advanced