Question: What county was the last assignment of the 865th Technical Training Squadron?

Context paragraphs:
866th Technical Training Squadron: The 866th Technical Training Squadron is an inactive United States Air Force unit.  Its last assignment was with the 1st Missile Division, based at Redstone Arsenal.  Huntsville, Alabama.  It was inactivated on 25 May 1962.

865th Technical Training Squadron: The 865th Technical Training Squadron is an inactive United States Air Force unit.  Its last assignment was with the 1st Missile Division, based at Redstone Arsenal.  Huntsville, Alabama.  It was inactivated on November 1, 1959.

418th Tactical Fighter Training Squadron: The 418th Tactical Fighter Training Squadron is an inactive United States Air Force unit.  Its last assignment was with the 58th Tactical Fighter Training Wing, being inactivated at Luke Air Force Base, Arizona on 1 October 1976.

868th Tactical Missile Training Squadron: The 868th Tactical Missile Training Squadron is an inactive unit of the United States Air Force.  Its last assignment was with the 868th Tactical Missile Training Group, stationed at Davis Monthan Air Force Base, Arizona.  It was inactivated on 31 May 1990.

481st Tactical Fighter Squadron: The 481st Tactical Fighter Training Squadron is an inactive United States Air Force fighter squadron.  Its last assignment was with the 27th Tactical Fighter Wing, being stationed at Cannon AFB, New Mexico.  It was inactivated on 8 July 1980.

312th Tactical Fighter Training Squadron: The 312th Tactical Fighter Training Squadron is an inactive United States Air Force unit.  Its last assignment was with the 58th Tactical Training Wing.  stationed at Luke Air Force Base, Arizona.  It was inactivated on 18 January 1991.

426th Tactical Fighter Training Squadron: The 426th Tactical Fighter Training Squadron is an inactive United States Air Force fighter squadron.  Its last assignment was with the 405th Tactical Training Wing, being inactivated at Luke Air Force Base, Arizona, on 19 November 1990.

672d Technical Training Squadron: The 672d Technical Training Squadron is an inactive United States Air Force unit.  Its last assignment was with the 705th Strategic Missile Wing, based at RAF Lakenheath, England.  It was inactivated on October 1, 1959.

Redstone Arsenal: Redstone Arsenal (RSA) is a United States Army post and a census-designated place (CDP) adjacent to Huntsville in Madison County, Alabama, United States and is part of the Huntsville-Decatur Combined Statistical Area.  The Arsenal is a garrison for a number of tenants including the United States Army Materiel Command, Army's Aviation and Missile Command, the Missile Defense Agency of the Department of Defense, and NASA's Marshall Space Flight Center.  Many of these units are moving due to decisions by the Defense Base Realignment and Closure Commission.  The Redstone Arsenal CDP had a population of 1,946 as of the 2010 census.  The base contains a government and contractor workforce that averages 36,000 to 40,000 personnel daily.

424th Tactical Air Support Training Squadron: The 424th Tactical Air Support Training Squadron is an inactive United States Air Force unit.  Its last assignment was with the 68th Tactical Air Support Group at Eglin Air Force Base, Florida, where the unit was inactivated on 31 March 1944.  The unit conducted crew training for special operations, then forward air control from 1970 through 1972.

Supporting paragraphs: 865th Technical Training Squadron Redstone Arsenal
Answer: Madison County