events
Rebel barons renounce their allegiance to King John of England — part of a chain of events leading to the signing of the Magna Carta.

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John, King of England
King of England from 1199 to 1216
John was King of England from 1199 until his death in 1216. He lost the Duchy of Normandy and most of his other French lands to King Philip II of France, resulting in the collapse of the Angevin Empire and contributing to the subsequent growth in power of the French Capetian…Source: Wikipedia (CC BY-SA)
Magna Carta
English charter of freedoms made in 1215
Magna Carta, sometimes spelled Magna Charta, is a royal charter of rights agreed to by King John of England at Runnymede, near Windsor, on 15 June 1215. First drafted by the Archbishop of Canterbury, Cardinal Stephen Langton, to make peace between the unpopular king and a group…Source: Wikipedia (CC BY-SA)