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

full_context: Document 1: Fort Bragg: Fort Bragg, North Carolina, is a military installation of the United States Army and is the largest military installation in the world (by population) with more than 50,000 active duty personnel. The installation is located within Cumberland, Hoke, Harnett and Moore counties. The installation borders the towns of Fayetteville, Spring Lake and Southern Pines. It was also a census-designated place in the 2010 Census, during which a population of 39,457 was identified. It is named for Confederate General Braxton Bragg. It covers over 251 sqmi . It is the home of the Army's XVIII Airborne Corps and is the headquarters of the United States Army Special Operations Command, which oversees the U.S. Army 1st Special Forces Command (Airborne) (Provisional) and 75th Ranger Regiment. It is also home to the U.S. Army Forces Command, U.S. Army Reserve Command, and Womack Army Medical Center. Fort Bragg maintains two airfields: Pope Field, where the United States Air Force stations global airlift and special operations assets as well as the Air Force Combat Control School, and Simmons Army Airfield, where Army aviation units support the needs of airborne and special operations forces on post.
Document 2: 507th Parachute Infantry Regiment (United States): The 507th Parachute Infantry Regiment (507th PIR), now the 507th Infantry Regiment, was an airborne infantry regiment of the United States Army. The regiment was initially assigned to the 82nd Airborne Division in World War II before transferring to the 17th Airborne Division. Now 1st Battalion, 507th Infantry Regiment is part of the United States Army Infantry School, subordinate to its Airborne and Ranger Training Brigade, responsible for the Army's Basic Airborne School, Jumpmaster School, Pathfinder School, and the "Silver Wings" Command Exhibition Parachute Team.
Document 3: Ken MacAfee (wide receiver): Kenneth Adams MacAfee, Sr. (August 31, 1929 – July 4, 2007) was an American football tight end in the National Football League for the New York Giants, the Philadelphia Eagles, and the Washington Redskins. He played college football at the University of Alabama. He is the father of College Football Hall of Fame tight end Ken MacAfee.
Document 4: 506th Infantry Regiment (United States): The 506th Infantry Regiment, originally designated the 506th Parachute Infantry Regiment (506th PIR) during World War II, is an airborne light infantry regiment of the United States Army. Currently a parent regiment under the U.S. Army Regimental System, the regiment has two active battalions: the 1st Battalion, 506th Infantry Regiment (1-506th) is assigned to the 1st Brigade Combat Team, 101st Airborne Division, and the 2nd Battalion, 506th Infantry Regiment (2-506th) is assigned to the 3rd Brigade Combat Team, 101st Airborne Division.
Document 5: Pat Tillman: Patrick Daniel Tillman (November 6, 1976 – April 22, 2004) was a professional American football player in the National Football League (NFL) who left his sports career and enlisted in the United States Army in June 2002 in the aftermath of the September 11 attacks. His service in Iraq and Afghanistan, and subsequent death, were the subject of much media attention.
Document 6: 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.
Document 7: 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.
Document 8: 98th Civil Affairs Battalion: The 98th Civil Affairs Battalion (Airborne) is a civil affairs battalion of the 95th Civil Affairs Brigade (Airborne), based at Fort Bragg, North Carolina, and part of the United States Army Special Operations Command. The battalion was activated on 16 March 2008 at Fort Bragg and was assigned to the 95th Civil Affairs Brigade (Airborne). As of March 2008, soldiers of the 98th Civil Affairs Battalion participated in Operation Iraqi Freedom and other operations in Africa. Other 98th Civil Affairs Battalion soldiers were expected to deploy in support of the Global War on Terror later in 2008.
Document 9: Pat Tillman: Patrick Daniel Tillman (November 6, 1976 – April 22, 2004) was a professional American football player in the National Football League (NFL) who left his sports career and enlisted in the United States Army in June 2002 in the aftermath of the September 11 attacks. His service in Iraq and Afghanistan, and subsequent death, were the subject of much media attention.
Document 10: 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.
Document 11: 82nd Airborne Division War Memorial Museum: The 82nd Airborne Division War Memorial Museum is a museum located at Ardennes and Gela Streets on the Fort Bragg Army base. Established in 1945, the museum chronicles the history of the 82nd Airborne Division from 1917 to the present including World War I, World War II, Vietnam War, and Persian Gulf Wars as well as campaigns in Grenada, Panama, Operation Golden Pheasant, Operation Restore Hope and Operation Enduring Freedom. The museum is open to the public but photo id and a vehicle search is required to enter Fort Bragg.
Document 12: United States Army Airborne School: The United States Army Airborne School – widely known as Jump School – conducts the basic paratrooper (military parachutist) training for the United States armed forces. It is operated by the 1st Battalion (Airborne), 507th Infantry, United States Army Infantry School, Fort Benning, Georgia. The Airborne School conducts the Basic Airborne Course, which is open to troops of both genders from all branches of the United States Department of Defense, Reserve Officer Training Corps, and allied military personnel. All students must volunteer to attend the course.
Document 13: Matt Millen: Matthew George "Matt" Millen (born March 12, 1958) is an American former National Football League linebacker, and former executive. Millen played for the Oakland Raiders, the San Francisco 49ers and the Washington Redskins. In Millen's 12-year NFL playing career, he played on four teams that won the Super Bowl. Millen won a Super Bowl ring with each of the three teams for which he played; moreover, he won a Super Bowl ring in each of the four cities in which he played (the Raiders won championships in both Oakland and Los Angeles during his tenure).
Document 14: 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.
Document 15: 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.
ground_truth: 82nd Airborne Division