The battlefield at Agincourt in 1415 was a quagmire that shaped the course of the fight. Heavy autumn rains had soaked the freshly ploughed farmland, leaving the ground waterlogged and sticky. When thousands of heavily armoured French knights and men-at-arms advanced in close formation, the soil sucked at their feet, slowing their charge to an exhausting crawl. Horses struggled to keep balance, and when they fell, they created deadly obstacles in the churned mud. The weight of armour, combined w