Query: In which county is the park commemorating the Battle of Frenchtown?
Context: The Battle of Frenchtown (January 18–23, 1813) was part of a United States effort to retake the city, and American 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 finally recaptured by the United States later that year.