It is said that the cares of kings come in flocks, and that the sight of dark skies brings further storms. The first signs of internal rebellion emerged in 1209, when some of the northern barons were in communication with the king of France over the possibility of an invasion. It is no coincidence that in this year John went on military expedition to the north in order to cow King William of Scotland. He also took care to assert his authority over his own northern lands. The conspiracy faded away. Three years later the king felt obliged to refortify his castles, particularly in the border regions, where the magnates had always been more independent. Rumour spread that the barons were planning to depose the king. In turn John demanded hostages from the more recalcitrant of them. In 1213 he razed the castles of one who was believed to be planning to lead the revolt, Robert Fitzwalter, until a fragile peace was restored between them.
The king was surrounded by too many enemies, and it became necessary to placate the most important of them. It was widely rumoured, in the early months of 1213, that Pope Innocent III had sent an open letter deposing John and urging King Philip of France to invade England. Yet in spring John surrendered. On 15 May he agreed to accept all of the pope’s claims and demands. He went further. He agreed to yield his country to the pope and receive it back as a fief; he was, in effect, about to become the pope’s feudal vassal. Several sound reasons could be advanced for what seems on the face of it abject surrender. King Philip, even as he was organizing a force to sail across the Channel, was forced to cancel his invasion. He could not attack the pope’s new realm. The king’s status as the pope’s vassal might also deter his rebellious barons. Pope Innocent III himself, as subsequent events would testify, became a formidable ally and defender of royal power against insurgent subjects. King John was also a newly blessed representative of God. As the papal legate in England put it, ‘the lord king is another man by God’s grace’.
So the lord king decided to press home his advantage and make one more attempt to recover his Angevin Empire from the French king. In the following year he created a coalition of princes – among them the Holy Roman Emperor, Otto IV, and the count of Flanders – who were intent upon acquiring French land. The count and the emperor would proceed against the French army from the north-east, while King John would advance from Poitou in the west. The strategy was excellent, but its execution was misjudged. Many confused skirmishes and sieges took place, and on 27 July 1214 the forces of John and Otto were decisively defeated by King Philip outside the village of Bouvines. It was the final battle for the Angevin Empire. John had lost everything for which he most cared.
The failure at the battle of Bouvines was in effect the harbinger of baronial rebellion. The magnates may not have been greatly exercised by the loss of empire, but they were enraged at the amount of money wasted on a failed cause. It was the crowning point of their belief in the king’s misjudgment and military ineptitude. In the aftermath of the defeat there emerged what has since become known as a ‘baronial party’, brought together by the manifold causes and complaints that have already been outlined. The imposition of fines and taxes, the predominant advice of ‘evil counsellors’, the decay in their social and military pre-eminence, were all part of baronial rebellion against authoritarian and ruthless Angevin rule.
The principal centres of revolt were the north, the west and East Anglia; but the barons did not necessarily form distinct or coherent groups. Family was divided against family; district was opposed to district. A group of 39 barons, out of a total baronage of 197, were in open revolt against the Crown; approximately the same number were its faithful supporters. The remainder were uncertain, and probably fearful of the future.
The rebels did find an unexpected champion in the new archbishop, however; on his return to England Stephen Langton restated the old principles enshrined in the document known as Leges Henrici Primi that nothing can be taken or demanded by the king except ‘by right and reason, by law of the land and justice and by a court’s judgment’. That, clearly, had not been King John’s manner of proceeding.
The king and the rebellious barons met on various occasions, making little if any progress. The pope was persuaded to write to the rebels, forbidding the use of force or violence against their anointed king. He also wrote to Stephen Langton, accusing the archbishop of taking the side of the barons. The king then engineered what he must have considered a master stroke. On 4 March 1215, he assumed the cross of the crusader. Who could ride against a knight of Christ?