Nouveau Redon had a spring within its walls, thus ensuring that the men within could withstand a fairly long siege. Cornwallis and Radcliff determined to end the siege by cutting off the spring. To that end, Cornwallis took a page from the The Gallic War, and ordered an excuvation project to find the underground source of the spring. After some time, miners found the source, and dynamited the it, redirecting the flow and draining the spring in the fort. Kersauzon, furious and desperate, ordered an attack. French forces poured forward and were destroyed, Kersauzon among them.