The Anarchy England. An illegitimate son of Henry I and the half-brother of the Empress Matilda, Robert was one of the most powerful Anglo-Norman barons, controlling estates in Normandy as well as the Earldom of Gloucester. In 1138, Robert renounced his fealty to Stephen and declared his support for Matilda, triggering a major regional rebellion in Kent and across the south-west of England, although Robert himself remained in Normandy. Matilda had not been particularly active in asserting her claims to throne since 1135 and in many ways it was Robert that took the initiative in declaring war in 1138. In France, Geoffrey
Henry I of England of the senior clergy in England and Normandy. Henry's only legitimate son and heir, William Adelin, drowned in the "White Ship" disaster of 1120, throwing the royal succession into doubt. Henry took a second wife, Adeliza of Louvain, in the hope of having another son, but their marriage was childless. In response to this, Henry declared his daughter, Empress Matilda, his heir and married her to Geoffrey of Anjou. The relationship between Henry and the couple became strained, and fighting broke out along the border with Anjou. Henry died on 1 December 1135 after a week of illness. Despite his