Brooks Field (ICAO: KRMY, FAA LID: RMY) is a city-owned, public-use airport located one nautical mile (1.85 km) south of the central business district of Marshall, a city in Calhoun County, Michigan, United States. Brooks Field was officially dedicated in 1931, although the first plane landed there on November 9, 1929.Although many U.S. airports use the same three-letter location identifier for the FAA and IATA, this airport is assigned RMY by the FAA and no designation from the IATA.