The Second Barons' War—Causes

The Second Barons' War started in 1264 by Simon de Montfort, the 6th Earl of Leicester, against King Henry III of England. Henry was relying to much on favorites for advice—many of them from France, which annoyed the English lords—and the barons of the land wanted to have more authority in guiding king and country.Ironically, de Montfort was one of those French foreigners whom Henry favored with not only his title (originally withheld, though his by right through his English mother), but also by marriage to Henry's sister. Such a royal marriage was a political matter, and traditionally the barons would be consulted. So de Montfort himself was one of the reasons the barons were not pleased with their king.de Montfort started to turn against Henry when de Montfort was put on trial for actions in Gascony. He had been named governor of Gascony in 1248, whereupon he exercised his authority by suppressing the local lords' excessive behavior. Although ultimately acquitted of improper…