Battle of Wilton Boulogne to England and claimed the throne. He quickly gained the support of London's magnates and the church, and seized control of the treasury at Winchester. He was crowned king on 22 December 1135. By 1138, Matilda had gathered enough support to challenge Stephen for the throne. Her supporters were led by her half-brother Robert Earl of Gloucester. The ensuing civil war lasted until 6 November 1153 when, by the Treaty of Wallingford, Stephen recognised Matilda's son Henry as heir to the throne. By 1142 both sides had become cautious of risking open battle, and the civil war became a
Battle of the Standard and in the settling of regained territory, he had drawn on the talent and resources of the Anglo-Norman lands. The death of Henry I in 1135, weakening England, made David more reliant on his native subjects, and allowed him to contemplate winning control over substantial areas of northern England. Henry I had wished his inheritance to pass to his daughter Matilda, and in 1127 made his notables swear an oath to uphold the succession of Matilda (David was the first layman to do so). Many of the English and Norman magnates and barons were against Matilda because she was married