From 1805 to 1847, Detroit was the capital of Michigan (first the territory, then the state). William Hull, the United States commander at Detroit surrendered without a fight to British troops and their Native American allies during the War of 1812 in the Siege of Detroit, believing his forces were vastly outnumbered. The Battle of Frenchtown (January 18–23, 1813) was part of a U.S. effort to retake the city, and U.S. troops suffered their highest fatalities of any battle in the war. This battle is commemorated at River Raisin National Battlefield Park south of Detroit in Monroe County. Detroit was recaptured by the United States later that year.