Fulk FitzWarin at the time of his death in 1197. Whittington Castle lies on the English side of Offa's Dyke, which during the Norman era and before was the border between England and Wales. The site was fortified as a castle by William Peverel in 1138, in support of Empress Matilda, the daughter of King Henry I (1100–1135), in her struggle (known as The Anarchy) for the throne against King Stephen (1135–1154), grandson of William the Conqueror. In the late 1140s the lordship of Whittington, like Oswestry and Overton ceased to be part of England and became part of the Kingdom of
England in the Middle Ages Black Death, including the Peasants' Revolt that broke out across the south of England in 1381. Over the coming decades, Richard and groups of nobles vied for power and control of policy towards France until Henry of Bolingbroke seized the throne with the support of parliament in 1399. Ruling as Henry IV, he exercised power through a royal council and parliament, while attempting to enforce political and religious conformity. His son, Henry V, reinvigorated the war with France and came close to achieving strategic success shortly before his death in 1422. Henry VI became king at the age of only