Some of the most important barons in…
June 1215 CE
Some of the most important barons in England, together with their French and Scots allies, enter London in force on June 10, 1215, with the city showing its sympathy with their cause by opening its gates to them.
They, and many of the moderates not in overt rebellion, force King John to agree to the "Articles of the Barons", to which his Great Seal is attached on June 15, 1215, in the meadow at Runnymede.
In return, the barons on June 19 renew their oaths of fealty to King John.
The contemporary chronicler, Roger of Wendover, will record the events in his Flores Historiarum.
The most significant clause for King John at the time is clause 61, known as the "security clause", the longest portion of the document.
This establishes a committee of twenty-five barons who can at any time meet and overrule the will of the King, through force by seizing his castles and possessions if needed.
This is based on a medieval legal practice known as distraint, but it is the first time it has been applied to a monarch.
In addition, the King is to take an oath of loyalty to the committee.
At Runnymede, Hubert de Burgh is appointed justiciar (chief political and judicial leader) of England.