On July 2, 1214, English King John orders a major retreat during the siege of the Roche-aux-Moines Fortress, despite having a larger force, when French Prince Louis army approached. This allowed the French to secure the region and solidify on July 27, 1214 their victory in the decisive Battle of Bouvines where French Philip II Augustus defeated the main Allied army.
The combination of the retreat, the loss at the battle of Bouvines, where his coalition was defeated, and the failure of his campaign to recover Normandy lands, led to the collapse of his continental alliance and to the subsequent baron rebellion that forced him to seal the Magna Carta in June 1215.
