when did that happen?
Around 1211 to 1216.
John, King of England
am Marshal and Ranulf de Blondeville, 6th Earl of Chester. The rebels lacked the engineering expertise or heavy equipment necessary to assault the network of royal castles that cut off the northern rebel barons from those in the south. John's strategy was to isolate the rebel barons in London, protect his own supply lines to his key source of mercenaries in Flanders, prevent the French from landing in the south-east, and then win the war through slow attrition. John put off dealing with the badly deteriorating situation in North Wales, where Llywelyn the Great was leading a rebellion against the 1211 settlement.

John's campaign started well. In November John retook Rochester Castle from rebel baron William d'Aubigny in a sophisticated assault. One chronicler had not seen "a siege so hard pressed or so strongly resisted", whilst historian Reginald Brown describes it as "one of the greatest [siege] operations in England up to that time". Having regained the south-east John split his for
what are the 63 clauses of the magna carta UNANSWERABLE when was it signed? There were no signatures on the charter of 1215. who were the participants? 27 ecclesiastical and secular magnates and 25 barons. who initiated it? King John of England. when was he born? 24 December 1166. which war did he face? A war with rebel barons.
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John, King of England [SEP] War with the barons
The rebels made the first move in the war, seizing the strategic Rochester Castle, owned by Langton but left almost unguarded by the archbishop. John was well prepared for a conflict. He had stockpiled money to pay for mercenaries and ensured the support of the powerful marcher lords with their own feudal forces, such as William Marshal and Ranulf de Blondeville, 6th Earl of Chester. The rebels lacked the engineering expertise or heavy equipment necessary to assault the network of royal castles that cut off the northern rebel barons from those in the south. John's strategy was to isolate the rebel barons in London, protect his own supply lines to his key source of mercenaries in Flanders, prevent the French from landing in the south-east, and then win the war through slow attrition.