Question: What Illinois city are the headquarters for the league that the Western Illinois Leathernecks play in located in?
Sentence (from "2009 Western Illinois Leathernecks football team"): 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.
Relevant evidence: No