The United States Disciplinary Barracks (or USDB, popularly known as Leavenworth, or the DB) is a military prison located on Fort Leavenworth, a United States Army post in Kansas. It is one of three major prisons built on Fort Leavenworth property, the others being the federal United States Penitentiary, Leavenworth, four miles (6 km) to the south, and the military Midwest Joint Regional Correctional Facility, which opened on 5 October 2010. It reports to the United States Army Corrections Command and its commandant usually holds the rank of Colonel.