Medieval England was the scene of several violent dynastic collapses: the fall of the West Saxon kings, when William the Conqueror defeated Harold Godwinson in 1066; the civil war known as The Anarchy from 1139–1153 between Stephen and Empress Matilda, a time when 'Christ and his saints were asleep', which ended the Norman line of kings; the reign of the last Angevin, John, King of England, known as 'Lackland'; the tyranny of the last Plantagenet monarch, Richard II, who was defeated by Henry, duke of Lancaster, later Henry IV; the destruction of the Lancastrian dynasty during the Wars of the Roses, and especially at the battle of Tewkesbury in 1471; and the battle of Bosworth, which saw the end of Richard III and the Yorkist line