The siege of Detroit took place from August 15–16, 1812, during the War of 1812 and Tecumseh's War. During the siege, Major General Isaac Brock and Shawnee leader Tecumseh along with his allies both led an attack on Fort Shelby in Detroit, Michigan Territory. Brock and Tecumseh defeated the American army and took control of the Fort and town of Detroit after U.S. Brigadier General William Hull surrendered.