Montfort, Simon de, Earl of Leicester (c.1208-65), Henry III's most redoubtable opponent in the Barons' wars. Born in Montfort, he was well received by Henry when he arrived in England in 1230, allowed to claim the earldom of Leicester, and married the king's youngest sister Eleanor. He went on crusade in 1240-1, and in 1248 was appointed the king's deputy in Gascony, where he put down a revolt with severity. After his return to England in 1253 he became a central figure in the baronial opposition, helping impose the Provisions of Oxford which greatly reduced royal authority. He emerged as sole leader of the opposition in 1263, but his position had weakened, for many magnates suspected him of having designs on the throne. The Provisions of Oxford were referred to Louis IX of France for arbitration, and when, in 1264, Louis declared in favour of Henry, war broke out.
Although the campaign began badly for Montfort, he transformed it by besieging Rochester to draw the king south, and united his own divided forces to beat the king at Lewes. Henry and his son Edward surrendered by an agreement which reimposed the Provisions of Oxford but allowed some of Montfort's most committed opponents to escape. Virtually ruler of England, Montfort provoked dissatisfaction amongst some of his most notable supporters: Edward escaped and war broke out again. Edward surprised one of Montfort's armies, under his son Simon, outside the Montfort stronghold of Kenilworth. Montfort himself was caught, outnumbered, at Evesham. As he watched his foes converge, he is reported to have said: ‘may God have mercy on our souls, for our bodies are theirs’, but he and his men ‘proceeded courageously to meet the multitude of their enemies’. Montfort fought valiantly, hoping that his son would arrive in time. He was killed and mutilated, but such was his reputation—he had a flair for attracting popular support, especially in London—that miracles were soon associated with his tomb in Evesham abbey.
Montfort was a skilled commander, and deserves admiration for overcoming the strategic disadvantage of divided forces at the start of the first Barons' war. At Lewes he showed a sharp eye for the ground, and got his army onto the downs above the town by night, no easy feat. He had a good grasp of fortification and siegecraft: the improvements he had made to Kenilworth castle enabled it to undergo a long siege after his death.
— Richard Holmes





