High Quality Content by WIKIPEDIA articles! The Siege of Detroit, also known as the Surrender of Detroit, or the Battle of Fort Detroit, was an early engagement in the Anglo-American War of 1812. A British force under Major General Isaac Brock with Native American allies under the Shawnee leader Tecumseh used bluff and deception to intimidate the American Brigadier General William Hull into surrendering the fort and town of Detroit, Michigan and a dispirited army which nevertheless outnumbered the victorious British and Native Americans. The British victory reinvigorated the defenders of Upper Canada, who had previously been pessimistic and affected by pro-American agitators. Many Native American people in the Northwest Territory were inspired to take arms against American outposts and settlers. Although the Americans were not demoralised by their defeat, it was more than a year before they recovered Detroit and defeated the weakened British forces on the Detroit frontier.