This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.
John became King of England in 1199 already holding, on paper, one of the largest realms in Europe: England joined to Normandy, Anjou, Maine, Touraine and Aquitaine, the Angevin patchwork his father Henry II had assembled and his brother Richard I had spent a reign defending. John lost most of it in five years. Philip II of France pressed a legal case against him in 1202 over the murder of his own nephew and rival Arthur of Brittany, then took the field, and by 1204 Normandy itself, the duchy the English royal house had held since 1066, was gone. The lost French revenues had to be replaced from England alone, and John replaced them with scutage payments, arbitrary reliefs on inheritances, and a justice system that leaned harder on fines than any king before him, exactly the grievances his barons wrote into Magna Carta a decade later. He compounded the financial pressure with a needless quarrel with Pope Innocent III over who would be Archbishop of Canterbury, a dispute that closed England's churches under interdict from 1208 and had John himself excommunicated from 1209; he only settled it in 1213 by surrendering England to the Pope as a fief and receiving it back as a papal vassal, buying peace with Rome at the cost of his own independence as a king. When the barons finally cornered him at Runnymede in June 1215, Magna Carta was the price of ending an open rebellion, not a considered constitutional settlement, and John treated it exactly that way: within ten weeks Innocent III, now John's own feudal lord, annulled the Charter at his request, and the barons who had just extracted it went straight back to war. John died in October 1216 with that war, the First Barons War, still unresolved, the Angevin empire gone, and the Charter he had signed and unsigned in the same year still to be settled by the regency that outlived him.