The Siege of Castillon took place from 1451 to 1452 during the final phase of the Hundred Years' War. It was a significant conflict between the forces of the Kingdom of England and the Kingdom of France. The French, led by Jean Bureau, aimed to reclaim territories lost to the English, particularly the town of Castillon in the region of Aquitaine. The siege ended with a decisive French victory, marking a turning point in the war. The use of artillery by the French played a crucial role in breaching the town's defenses. This victory helped solidify French control over Aquitaine and contributed to the eventual end of English territorial claims in France.