Editing Peter II, Count of Savoy (section)

===English Reform and Second Baronial War===
Peter of Savoy played an important role in the events which led to the [[Provisions of Oxford]] in England in 1258 which would lead to the [[Second Barons' War]]. Prior to the formal demands made in Westminster of [[Henry III of England|King Henry III]] on 30 April 1258, a number of barons had made a solemn oath on 12 April 1258 to assist each other in supporting the reform of the realm. These oath takers would form the core of the baronial movement supporting reform, and were “[[Richard de Clare, 6th Earl of Gloucester]]; [[Roger Bigod, 4th Earl of Norfolk]]; [[Simon de Montfort, 6th Earl of Leicester]]; Peter of Savoy; Hugh Bigod; John fitz Geoffrey; and Peter of Montfort.” Peter of Savoy sided with the reforming barons in order to reduce the political influence of the [[House of Lusignan#In England|Lusignan]] half brothers of [[Henry III of England|King Henry III]] who were in the view of Peter and his niece, the Queen [[Eleanor of Provence]] exerting undue influence at court.{{sfn|Howell|2001|p=226}} However, Peter broke with the reformers in 1260 when Montfort had him removed from the ruling council.{{sfn|Jobson|2012|p=48}} Thereafter Peter of Savoy spent an increasing time in [[Savoy]] until becoming [[Count of Savoy]] in 1263.

Following the [[Battle of Evesham]] in 1265 [[Pevensey Castle]] and [[Richmond Castle]] were besieged by the Monfortian government. Both castles were held by Peter’s constables and stewards. [[Pevensey Castle]] in particular received a resupply of men and material from Peter in Flanders. Peter and [[Eleanor of Provence]] had gathered an army in Flanders to invade England to restore [[Henry III of England|King Henry III]] to his throne. The escape of Lord Edward and subsequent [[Battle of Evesham]] rendered the invasion unnecessary.<ref name="Marshall, John 2023"/>