After the Battle of Lewes, a triumvirate had been set up, consisting of Montfort, Gilbert de Clare, Earl of Gloucester, and Stephen Bersted, Bishop of Chichester.
The arrangement in effect took control of government out of the hands of King Henry, and placed it with the baronial faction led by Simon de Montfort.
[4] There was also mention of reform of the church and royal government, particularly to do with banning foreigners from official positions.
[5] On 15 August the document was dispatched to King Louis IX of France, who previously had been acting as an arbiter between the two parties.
[6] The baronial rule came to an end on 4 August 1265, when Montfort was defeated and killed at the Battle of Evesham, and Henry was restored to full powers.