The Barons' War against Henry III began in 1258 with similar grievances as the previous revolt against King John in 1215. The Barons aimed to reduce the King's power, but they failed as they also had in 1215. An indirect result of this war was that Bracton failed to complete his great legal treatise. The forms of action in trespass "vi et armis", among other forms of action in trespass and seisin were developed at this time. The phrase of Simon de Montfort, 6th Earl of Leicester was, "Wars are the result of extra-judicial distress." This is an important observation to understand the time of Bracton. The use of war was another tool, beside the rule of law, for the powerful to attain their ends. The barons' grievances resulted in the Statute of Marlborough in 1267.