The River Raisin National Battlefield Park was established as the 393rd unit of the United States National Park Service under Title VII of the Omnibus Public Land Management Act, which was signed into law on March 30, 2009. The park is located in the city of Monroe in Monroe County, Michigan. It was designated as a Michigan Historic Site on February 18, 1956 and was added to the National Register of Historic Places on December 10, 1982. It officially began operation as a national park unit on October 22, 2010 and is the only national battlefield park from the War of 1812.