Provisions of Oxford in the context of "King Edward I"

Edward I (17/18 June 1239 – 7 July 1307), also known as Edward Longshanks and the Hammer of the Scots (Latin: Malleus Scotorum), was King of England from 1272 to 1307. Concurrently, he was Lord of Ireland, and from 1254 to 1306 ruled Gascony as Duke of Aquitaine in his capacity as a vassal of the French king. Before his accession to the throne, he was commonly referred to as the Lord Edward.

The eldest son of Henry III, Edward was involved from an early age in the political intrigues of his father's reign. In 1259, he briefly sided with a baronial reform movement, supporting the Provisions of Oxford. After reconciling with his father, he remained loyal throughout the subsequent armed conflict, known as the Second Barons' War. After the Battle of Lewes, Edward was held hostage by the rebellious barons, but escaped after a few months and defeated the baronial leader Simon de Montfort at the Battle of Evesham in 1265. Within two years, the rebellion was extinguished and, with England pacified, Edward left to join the Ninth Crusade to the Holy Land in 1270. He was on his way home in 1272 when he was informed of his father's death. Making a slow return, he reached England in 1274 and was crowned at Westminster Abbey.

William Marshal, 1st Earl of Pembroke (1146 or 1147 – 14 May 1219), also called William the Marshal (Norman French: Williame li Mareschal, French: Guillaume le Maréchal), was an Anglo-Norman soldier and statesman during High Medieval England who served five English kings—Henry II and his son and co-ruler Young Henry, Richard I, John, and Henry III—as a royal adviser and agent and as a warrior of outstanding prowess.

Knighted in 1166, William spent his younger years as a successful competitor in military tournaments; 13th century chronicler Stephen Langton eulogises him as the "best knight that ever lived." In 1189, he became earl of Pembroke through his marriage to Isabel de Clare, whose parents were Aoife MacMurrough and Richard de Clare, 2nd Earl of Pembroke. The title of earl was not officially granted until 1199 and is considered to be the second creation of the Pembroke earldom. In 1216 upon the death of King John, William was appointed protector for John's nine-year-old Henry III and rector regis et regni (Latin for "governor of the king and of the kingdom"). Just before his death, William fulfilled a promise he said he made in his youth while on crusade by taking vows as a Knight Templar, and was buried in the Temple Church in London.

The Oxford Parliament, also known as the Mad Parliament, assembled in 1258 during the reign of Henry III of England. It is best known for the Provisions of Oxford, a set of constitutional reforms that forced the English king to govern according to the advice of a council of barons.

The Mise of Lewes was a settlement made on 14 May 1264 between King Henry III of England and his rebellious barons, led by Simon de Montfort. The settlement was made on the day of the Battle of Lewes, one of the two major battles of the Second Barons' War. The conflict between king and magnates was caused by dissatisfaction with the influence of foreigners at court and Henry's high level and new methods of taxation. In 1258, Henry had been forced to accept the Provisions of Oxford, which essentially left the royal government in the hands of a council of magnates, but this document went through a long series of revocations and reinstatements. In 1263, as the country was on the brink of civil war, the two parties had agreed to submit the matter to arbitration by the French king Louis IX. Louis was a firm believer in the royal prerogative, and decided clearly in favour of Henry. The outcome was unacceptable for the rebellious barons, and war between the two parties broke out almost immediately.

The Mise of Lewes was signed on the day of de Montfort's victory at the Battle of Lewes, though it is not known whether it happened during or after the battle. Neither are the terms of the document known, though it seems clear that they involved conditions for further negotiations. These efforts at a permanent settlement fell through, however, and the support for de Montfort's government gradually eroded. Henry's oldest son, Edward – the later King Edward I – started a military campaign that ended in the Battle of Evesham in August 1265, where de Montfort was defeated and killed. Parts of the baronial resistance still held out, but by the end of 1266 the final besieged garrison at Kenilworth Castle surrendered. The rebels were given pardons according to terms set out in the Dictum of Kenilworth.