Question: Clay Matthews was a paratrooper for what division, that is the U.S. Army's most strategically mobile division?

Context paragraphs:
1st (United Kingdom) Division: The 1st (United Kingdom) Division, formerly the 1st Armoured Division, is a division of the British Army, currently the only British division to be stationed in Germany.  Originally formed in November 1937 as the Mobile Division, it saw extensive service during World War II and was disbanded afterwards; reconstituted in 1976, it remains in service.  It should not be confused with the 1st Infantry Division, which saw service in World War II as a separate formation.

List of Sega mobile games: The following is a list of mobile games developed and published by Sega.  Sega started a cell-phone service featuring "Sonic the Hedgehog" characters in Japan in 2000, called "Sonic Cafe", and established a mobile division, Sega Mobile, in 2003.  In 2012, Sega established an official firm for smartphone and tablet development, called Sega Networks.

Clay Matthews III: William Clay Matthews III (born May 14, 1986) is an American football outside linebacker for the Green Bay Packers of the National Football League (NFL).  After attending Agoura High School in Agoura Hills, California, Matthews was a walk-on student athlete at the University of Southern California for the USC Trojans football team under head coach Pete Carroll.  At USC, Matthews was a standout special teams player, winning three consecutive Special Teams Player of the Year awards from 2006 to 2008; he also played reserve outside linebacker.  In these roles, he was part of three Pac-10 Championship teams.

Clay Matthews Jr.: William Clay Matthews Jr. (born March 15, 1956) is a former American football linebacker who played for the Cleveland Browns and the Atlanta Falcons.  He was the first round draft pick of the Cleveland Browns and played in 278 games over 19 NFL seasons, the 17th most appearances in league history (and most playing linebacker).  Matthews had 1,561 tackles in his career, the third most in NFL history, and is trailed most closely by Junior Seau with 1,522 tackles.

Casey Matthews: Casey Christopher Matthews (born January 16, 1989) is an American football linebacker who is currently a free agent.  He was drafted by the Philadelphia Eagles in the fourth round of the 2011 NFL Draft.  He played college football at Oregon.  He is the brother of Clay Matthews III.

Archibald Montgomery-Massingberd: Field Marshal Sir Archibald Armar Montgomery-Massingberd, (6 December 1871 – 13 October 1947), known as Archibald Armar Montgomery until October 1926, was a senior British Army officer who served as Chief of the Imperial General Staff (CIGS) from 1933 to 1936.  He served in the Second Boer War and in the First World War, and later was the driving force behind the formation of a permanent "Mobile Division", the fore-runner of the 1st Armoured Division.

15th Panzergrenadier Division (Wehrmacht): 15th Panzergrenadier Division was a mobile division of the German Army in World War II

82nd Airborne Division: The 82nd Airborne Division is an elite airborne infantry division of the United States Army, specializing in parachute assault operations into denied areas.  Based at Fort Bragg, North Carolina, the 82nd Airborne Division is part of the XVIII Airborne Corps.  The 82nd Airborne Division is the U.S. Army's most strategically mobile division.  Some sources consider the 82nd Airborne Division the most highly trained light infantry division in the world.  Recently the 82nd Airborne has been conducting operations in Iraq.  The 82nd Airborne has been assigned to advise and assist Iraqi Security Forces.

Clay Morrow: Clarence "Clay" Morrow was a fictional character in the FX television series "Sons of Anarchy".  He is played by Ron Perlman.  He is the former International President of the Sons of Anarchy Motorcycle Club, but is also something of a vigilante as he does everything in his power to ensure that drug dealers and rapists stay out of his town.  However, during the fourth season, Clay involves the club with a number of drug dealings with the cartel for his own protection and greed, wavering in his allegiance, and gradually reveals himself to be one of the story's antagonists.  He is 6' 2" and has a number of tattoos, most notably a Grim Reaper on his upper right arm and a Paratrooper tattoo on his upper left, along with the words "Death From Above" indicating that he served as a paratrooper in a military unit.  He also wears a golden pin of the same symbol on his kutte.  This symbol is often confused with the US Army Parachutist badge.  The Paratrooper symbol that Clay wears is an unofficial symbol, and would serve to indicate service, particularly combat service, as a paratrooper, and consists of a skull, with wings coming from the bottom of the skull, and curving up to meet the top of the skull.  Given that his and Gemma Teller's machinations are the driving source of conflict throughout the story, it can be argued that both he and Gemma are the series' main antagonists.

Clay Matthews Sr.: William Clay Matthews Sr. (August 1, 1928 – March 23, 2017) was an American football offensive tackle and patriarch of a family of professional players.  Matthews played for four seasons with the San Francisco 49ers of the NFL, the first in 1950.  His career was interrupted by the Korean War, and Matthews became a paratrooper for the Army's 82nd Airborne Division.  In 1953, he returned to the 49ers for three more seasons.  He played college football at Georgia Tech and was selected in the 25th round of the 1949 NFL Draft by the Los Angeles Rams, but never played for them.

Supporting paragraphs: Clay Matthews Sr. 82nd Airborne Division
Answer: 82nd Airborne Division