 A period of strife begun in 1263, known as the Second Barons' War, ended in a victory for the King in 1267, although the main turning point occurred in 1265 at the Battle of Evesham, where the barons' leader, Simon de Montfort was killed.The clauses of the provisions that limited monarchical authority were then annulled, but the legal clauses of the Provisions of Westminster were reaffirmed in the Statute of Marlborough (1267).The Provisions of Westminster have been described as the most important English legislation since the 1225 reissue of Magna Carta.