Question: What conference that is located in Illinois, INdiana, Kentucky, Missouri, and Wisconsin did the Fort Wayne Mastodons compete in while in NCAA Division II?
Context: The 2013–14 Fort Wayne Mastodons men's basketball team represented Indiana University – Purdue University Fort Wayne during the 2013–14 NCAA Division I men's basketball season.  The Mastodons, led by third year head coach Tony Jasick, played their home games at the Gates Sports Center and were members of The Summit League.  They finished the season 25–11, 10–4 in The Summit League play to finish in a tie for second place.  They advanced to the championship game of The Summit League Tournament where they lost to North Dakota State.  They were invited to the CollegeInsider.com Tournament where they defeated Akron in the first round before losing in the second round to VMI. The 2015–16 Fort Wayne Mastodons men's basketball team represented Indiana University – Purdue University Fort Wayne during the 2015–16 NCAA Division I men's basketball season.  The Mastodons, led by second year head coach Jon Coffman, played their home games at the Gates Sports Center, with five home games at the Allen County War Memorial Coliseum, and were members of The Summit League.  They finished the season 24–10, 12–4 in Summit League play to finish in a tie for the reglar season championship.  They lost in the semifinals of the Summit League Tournament to North Dakota State.  As a regular season league champion who was also the #1 seed in their league tournament, they received an automatic bid to the National Invitation Tournament where they lost in the first round to San Diego State. The 2014–15 Fort Wayne Mastodons men's basketball team represented Indiana University – Purdue University Fort Wayne during the 2014–15 NCAA Division I men's basketball season.  The Mastodons, led by first year head coach Jon Coffman, played their home games at the Gates Sports Center, with one home game at the Allen County War Memorial Coliseum, and were members of The Summit League.  They finished the season 16–15, 9–7 in Summit League play to finish in a tie for fourth place.  They lost in the quarterfinals of The Summit League Tournament to South Dakota.  They were invited to the CollegeInsider.com Tournament where they lost in the first round to Evansville The Fort Wayne Mastodons, formerly known as the IPFW Mastodons, are the athletic teams of Indiana University–Purdue University Fort Wayne.  The Mastodons compete as a NCAA Division I school in the Summit League for most sports and in the Midwestern Intercollegiate Volleyball Association for men's volleyball.  The university participates in 14 men’s and women’s sports.  Before joining NCAA Division I athletics, IPFW competed in the Great Lakes Valley Conference in the NCAA Division II. Hilliard Gates Sports Center is a multi-purpose arena located in the northeast corner of the Indiana University-Purdue University Fort Wayne campus, in Fort Wayne, Indiana.  It opened in 1981 and contains 68,106 square feet (6,327.3 m2) of space.  It is home to the Fort Wayne Mastodons volleyball and men's and women's basketball teams. The Fort Wayne Mastodons women's basketball team represents Indiana University – Purdue University Fort Wayne in Fort Wayne, Indiana.  The school's team currently competes in the Summit League. The 2015–16 Fort Wayne Mastodons women's basketball team represents Indiana University – Purdue University Fort Wayne during the 2015–16 NCAA Division I women's basketball season.  The Mastodons, led by ninth year head coach Chris Paul and played their home games at play their home games at the Hilliard Gates Sports Center, with one home game at the Allen County War Memorial Coliseum.  They were members of The Summit League.  They finished the season 7–23, 2–13 in Summit League play to finish in a tie for seventh place.  They lost in the quarterfinals of the The Summit League Women's Tournament to South Dakota State. Indiana University – Purdue University Fort Wayne (IPFW) is a coeducational public university in Fort Wayne, Indiana, United States.  Founded in 1964, IPFW is a cooperatively-managed regional campus of two state university systems: Indiana University and Purdue University.  IPFW enrolls 13,459 undergraduate and postgraduate students in nine colleges and schools, including a branch of the Indiana University School of Medicine.  IPFW offers more than 200 graduate and undergraduate degree programs through IU or Purdue universities.  The university's 14 men's and women's athletic teams compete in Division I of the NCAA Summit League and, since the 2016–17 school year, are known as the Fort Wayne Mastodons. The Fort Wayne Mastodons men's basketball team represents Indiana University – Purdue University Fort Wayne in Fort Wayne, Indiana.  The school's team currently competes in the Summit League.  The team has never played in the NCAA Division I Men's Basketball Tournament.  The Mastodons are coached by Jon Coffman and play their home games at the Hilliard Gates Sports Center and the Allen County War Memorial Coliseum in Fort Wayne, Indiana. The Great Lakes Valley Conference (GLVC) is a collegiate athletic conference affiliated at the National Collegiate Athletic Association (NCAA)'s Division II level.  Member institutions are located in the U.S. states of Illinois, Indiana, Kentucky, Missouri, and Wisconsin.
Answer: Great Lakes Valley Conference