In 1120, an English vessel known as the White Ship sank in the English Channel on its way from Normandy to England, killing hundreds of passengers. Among those who drowned was William, the only legitimate son of King Henry I. Henry’s second marriage was childless, and the latter years of his reign were marked by his attempts to secure the succession for his daughter Matilda. William’s death in 1135 led to a disputed succession and civil war between Matilda and whom? Discuss