Question: What Illinois city are the headquarters for the league that the Western Illinois Leathernecks play in located in?

Context paragraphs:
Western Illinois Leathernecks men's basketball: The Western Illinois Leathernecks men's basketball team represents Western Illinois University of Macomb, Illinois, in NCAA Division I men's college basketball competition.  The school's team currently competes in The Summit League.  The team plays its home games at 5,139-seat Western Hall and are coached by Billy Wright.

Western Illinois Leathernecks women's basketball: The Western Illinois Leathernecks women's basketball team represents Western Illinois University of Macomb, Illinois, in NCAA Division I women's college basketball competition.  The school's team currently competes in the Summit League.

2009 Western Illinois Leathernecks football team: The 2009 Western Illinois Leathernecks football team represented Western Illinois University in the 2009 NCAA Division I FCS football season.  The team was led by co-head coaches Mark Hendrickson in his second year and first full season as head coach and Don Patterson, who left the team late in the 2008 season due to health problems, but rejoined the team for the 2009 season, his last with Western Illinois.  They played their home games at Hanson Field.  The team finished the regular season with an 1–10 overall record and a 0–8 record in Missouri Valley Football Conference play.  The Leathernecks finished the season with the worst record in the Missouri Conference, and did not win a single conference game.

2016 Western Illinois Leathernecks football team: The 2016 Western Illinois Leathernecks football team represented Western Illinois University in the 2016 NCAA Division I FCS football season.  They were led by first year head coach Charlie Fisher and played their home games at Hanson Field.  They were a member of the Missouri Valley Football Conference.  They finished the season 6–5, 3–5 in MVFC play to finish in a tie for sixth place.

2012 Western Illinois Leathernecks football team: The 2012 Western Illinois Leathernecks football team represented Western Illinois University in the 2012 NCAA Division I FCS football season.  They were led by head coach Mark Hendrickson in his fourth full season and fifth overall year since coaching the first seven games of the 2008 season.  They played their home games at Hanson Field.  They are a member of the Missouri Valley Football Conference.  They finished the season 3–8, 1–7 in MVFC play to finish in ninth place.

Summit League: The Summit League, or The Summit, is an NCAA Division I intercollegiate athletic conference with its membership mostly located in the Midwestern United States from Indiana and Illinois on the East of the Mississippi River to the Dakotas and Nebraska on the West, with additional members in the Western state of Colorado and the Southern state of Oklahoma.  Originally dubbed the Association of Mid-Continent Universities in 1982, on June 1, 2007, the conference changed its name from the Mid-Continent Conference.  League headquarters are in Elmhurst, Illinois.

Western Illinois Leathernecks football: The Western Illinois Leathernecks football program is the intercollegiate American football team for Western Illinois University located in Macomb, Illinois.  The team competes in the NCAA Division I Football Championship Subdivision (FCS) and are members of the Missouri Valley Football Conference.  The school's first football team was fielded in 1903.  The team plays its home games at the 16,368 seat Hanson Field.

Western Illinois Leathernecks: The Western Illinois Leathernecks are the teams and athletes that represent Western Illinois University, located in Macomb, Illinois, in NCAA Division I sports.  The school's primary conference affiliation is with the Summit League; its football team is a member of the Division I FCS (formerly Division I-AA) Missouri Valley Football Conference.

2011 Western Illinois Leathernecks football team: The 2011 Western Illinois Leathernecks football team represented Western Illinois University in the 2011 NCAA Division I FCS football season.  The Leathernecks were led by head coach Mark Hendrickson in his 2nd full season and 4th overall year since coaching the first seven games of the 2008 season.  They played their home games at Hanson Field and are a member of the Missouri Valley Football Conference.  They finished the season 2–9, 1–7 in MVFC play to finish in last place.

2015 Western Illinois Leathernecks football team: The 2015 Western Illinois Leathernecks football team represented Western Illinois University in the 2015 NCAA Division I FCS football season.  They were led by third year head coach Bob Nielson and played their home games at Hanson Field.  They were a member of the Missouri Valley Football Conference.  They finished the season 7–6, 5–3 in MVFC play to finish in a three way tie for third place.  They received an at-large bid to the FCS playoffs where they defeated Dayton in the first round before losing in the second round to fellow MVFC member Illinois State.

Supporting paragraphs: Western Illinois Leathernecks Summit League
Answer: Elmhurst