As the raid on Harpers Ferry began to unravel, John Brown and his men retreated to a small brick building in the armory complex -- the engine house. Once inside, two horse drawn fire engines were wheeled around to block the doors. The building may have provided cover, but it also became a trap. On the morning of October 18, U.S. Marines, under the command of Lieutenant Colonel Robert E. Lee, stormed the building and captured the raiders. Read more and interact with this resource from American Experience: "John Brown's Holy War."