Question: The United States Bullion Depository, often known as Fort Knox, is a fortified vault building located the United States Army post of Fort Knox, in Kentucky south of Louisville and north of where?
Context: Fort Knox is a United States Army post in Kentucky south of Louisville and north of Elizabethtown.  It is also the site of the United States Bullion Depository, which is used to house a large portion of the United States' official gold reserves.  The 109,000 acre (170 sq mi, 441 km²) base covers parts of Bullitt, Hardin, and Meade counties.  It currently holds the Army Human Resources Center of Excellence to include the Army Human Resources Command, United States Army Cadet Command and the United States Army Accessions Command. The United States Bullion Depository, often known as Fort Knox, is a fortified vault building located within the United States Army post of Fort Knox, Kentucky.  The vault is used to store a large portion of United States official gold reserves and occasionally other precious items belonging or entrusted to the federal government.  It is estimated to hold roughly 2.3% of all the gold ever refined throughout human history. The 4th Cavalry Regiment is a United States Army cavalry regiment, whose lineage is traced back to the mid-19th century.  It was one of the most effective units of the Army against American Indians on the Texas frontier.  Today, the regiment exists as separate squadrons within the U.S. Army.  The 1st Squadron of the 4th Cavalry's official nickname is "Quarterhorse", which alludes to its 1/4 Cav designation.  The 3rd Squadron of the 4th Cavalry's official nickname is "Raiders".  Today, the "1st Squadron, 4th Cavalry", "2nd Squadron, 4th Cavalry", "4th Squadron, 4th Cavalry", and "6th Squadron, 4th Cavalry" are parts of the 1st Infantry Division, while the "3rd Squadron, 4th Cavalry" serves as part of the 25th Infantry Division.  On 23 September 2009, the "4th Squadron, 4th Cavalry" officially stood up at Fort Riley, Kansas as part of the 1st "Devil" Brigade, 1st Infantry Division.  On 28 March 2008, the "5th Squadron, 4th Cavalry" officially stood up at Fort Riley, Kansas as part of the 2nd "Dagger" Brigade, 1st Infantry Division.  The 6th Squadron, 4th Cavalry served as part of the recently inactivated 1st Infantry Division, 3rd "Duke" Brigade, at Fort Knox, Kentucky. The 100th Division (formerly the 100th Infantry Division) is an infantry division of the United States Army headquartered at Fort Knox, Kentucky.  It currently serves as a major training command of the United States Army Reserve. The 100th Army Band is a United States Army Reserve unit stationed at Fort Knox, Kentucky, and attached to the 81st Regional Support Command.  It was reassigned from the 100th Infantry Division on 1 October 2008 as part of the Army Reserve Transformation process.  The 100th Army Band currently features eight musical performance teams (MPTs) that perform a wide range of repertoire.  Since 2012, performance requests have taken the band’s various ensembles across Kentucky and across the nation into other states including Tennessee, Ohio, Indiana, Illinois, Maryland, Florida, South Carolina, Kansas, Alabama, Georgia, Texas, Virginia, and Hawaii. Godman Army Airfield (IATA: FTK, ICAO: KFTK, FAA LID: FTK) is a military airport located on the Fort Knox United States Army post in Hardin County, Kentucky, United States.  It has four runways and is used entirely by the United States Army Aviation Branch. The Elizabethtown–Fort Knox Metropolitan Statistical Area, as defined by the United States Census Bureau, is an area consisting of two counties in Kentucky, anchored by the city of Elizabethtown and the nearby Fort Knox Army post.  As of the 2000 census, the MSA had a population of 107,547 (though a July 1, 2009 estimate placed the population at 113,433). Albert "Al" Bryant Jr. (born February 22, 1952) is a retired United States Army brigadier general, best known for service as the Chief of Western Hemisphere Operations during and in the aftermath of the September 11 attacks and for his tenure as the Assistant Division Commander of the 4th Infantry Division at the time of the division's detection and capture of deposed Iraqi president Sadaam Hussein.  Bryant also served as the Deputy Commander of Fort Knox, Kentucky, and the United States Army's Armor School. First Army Division East is a division of the First United States Army.  With its new role, the First Army developed two subordinate multi-component headquarters – one division to support the eastern United States and the other to support the western United States.  First Army Division West was activated at Fort Carson, Colorado, and later moved to Fort Hood, Texas.  First Army Division East was activated on 7 March 2007, and is headquartered at Fort Knox, Kentucky. North Carolina Granite Corporation Quarry Complex is a historic granite quarry and national historic district located at Mount Airy, Surry County, North Carolina.  The district encompasses 22 contributing buildings, 1 contributing site, and 8 contributing structures in an area approximately one mile long and 1/3 mile wide.  Notable contributing resources include the cutting shed (1927), the office building (1928), and a building originally used as a blacksmith shop.  It is the world's largest open faced granite quarry.  Granite from the quarry was used to build the United States Bullion Depository at Fort Knox, the Arlington Memorial Bridge in Washington, the Wright Brothers National Memorial at Kitty Hawk, and the Albert Einstein Memorial in Washington.
Answer: Elizabethtown