Question: The Defenders were a professional indoor football team based in a city which as of 2015 has a population of what?

Context articles: Bloomington Edge
Chicago Pythons
Wichita Wild
Oklahoma Defenders
Tulsa, Oklahoma
Maryland Maniacs
Alabama Hammers
Columbus Lions
Marion Mayhem
Lehigh Valley Steelhawks

The Bloomington Edge are a professional indoor football team based in Bloomington, Illinois.
 They are currently a member of the Indoor Football League (IFL).
 Originally named the Bloomington Extreme, the team was a member of United Indoor Football (UIF), and joined the Indoor Football League (IFL) in 2009 during the UIF and Intense Football League merger.
 They left the IFL for the Champions Professional Indoor Football League (CPIFL) in 2013, and in 2015 the CPIFL merged with the Lone Star Football League (LSFL) to create Champions Indoor Football (CIF), where Bloomington did not follow and joined X-League Indoor Football (X-League).
 Following the 2015 season the Edge joined the CIF.
 For the 2018 season, the Edge then rejoined the IFL.
 The Edge play their home games at the Grossinger Motors Arena.
The Chicago Pythons were a professional indoor football team based in Homer Glen, Illinois.
 The team was a member of the Continental Indoor Football League (CIFL).
 The Pythons joined the CIFL in 2012 as an expansion team under the name "Chicago Vipers".
 They changed their name to the "Chicago Pythons" four weeks into the season.
 The Pythons were the third indoor football team based in the Chicago area.
 The Chicago Rush of the Arena Football League were based in Rosemont, and the Chicago Slaughter of the Indoor Football League are based in Hoffman Estates.
 The Pythons replaced the Chicago Knights, formerly the Chicago Cardinals, as the Illinois-based CIFL team, which replaced the Slaughter after they left for the Indoor Football League after a dispute with CIFL management.
 The Owner of the Pythons was Michael Duran.
 The Pythons were supposed to play their home games at The Megaplex in Homer Glen, Illinois, but the team never hosted a home game.
The Wichita Wild were a professional indoor football team based in Wichita, Kansas.
 They were members of the Champions Professional Indoor Football League (CPIFL).
 The team was founded in 2006 as an independent indoor football franchise.
 In 2008, the team joined United Indoor Football (UIF).
 They joined the Indoor Football League (IFL) during the UIF and Intense Football League merger of 2009.
 In 2012, the team left the IFL to become charter members of the CPIFL.
 The Wild's home games were played at Hartman Arena in nearby Park City.
 When they lost their lease with the Hartman Arena, they folded.
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The Oklahoma Defenders were a professional indoor football team and a charter member of the Champions Professional Indoor Football League (CPIFL).
 Based in Tulsa, Oklahoma, the Defenders played their home games at the Cox Business Center.
Tulsa is the second-largest city in the state of Oklahoma and 47th-most populous city in the United States.
 As of July 2015, the population was 403,505, an increase of 11,599 over that reported in the 2010 Census.
 It is the principal municipality of the Tulsa Metropolitan Area, a region with 981,005 residents in the MSA and 1,151,172 in the CSA.
 The city serves as the county seat of Tulsa County, the most densely populated county in Oklahoma, with urban development extending into Osage, Rogers, and Wagoner counties.
The Maryland Maniacs were a professional Indoor Football team based in College Park, Maryland, and a member of the Indoor Football League.
 The team began play in 2009 as an expansion team in the Indoor Football League.
 The Maniacs were the second indoor football team to be based in Maryland, following the Chesapeake Tide of the Continental Indoor Football League, who played in the same market.
 The owner of the Maniacs was Messay Hailermariam.
 The Maniacs played its home games at Cole Field House.
 Inaugural season home games were held at The Show Place Arena.
 They left the Indoor Football League in 2011, and have been rumored to be in discussion with American Indoor Football about joining their league.
The Alabama Hammers were a professional indoor football team based in Huntsville, Alabama.
 The team played in the Professional Indoor Football League (PIFL) from 2012 to 2015.
 The Hammers originally began play as an expansion team in the Southern Indoor Football League in 2011.
 The Hammers are the fourth indoor football team to play at the Von Braun Center; these were the Alabama Vipers of the AFL (2010), the Tennessee Valley Vipers of the af2 (2000–2004 and 2006–2009), and the Tennessee Valley Raptors of the United Indoor Football league (2005).
 The owner of the Hammers is Southern Sports Entertainment, LLC.
 The Hammers play their home games at the Von Braun Center.
 Their name comes from the Yellowhammer, the state bird of Alabama.
The Columbus Lions are a professional indoor football team based in Columbus, Georgia and a founding member of the National Arena League (NAL) for the 2017 season.
 The Lions were founded in 2006 as an expansion team of the World Indoor Football League (WIFL).
 After the WIFL went under in 2007, the Lions joined the American Indoor Football Association (AIFA) where they played for two seasons.
 When the AIFA broke apart, the Lions joined the Southern Indoor Football League (SIFL).
 The Lions joined the Professional Indoor Football League (PIFL) in 2012 when the Southern Indoor Football League (SIFL) teams split up into two new leagues.
 After the 2015 season, the PIFL broke apart, and the Lions joined American Indoor Football for 2016.
The Marion Mayhem were a professional indoor football team based in Marion, Ohio.
 The team was a charter member of the Great Lakes Indoor Football League (GLIFL), later renamed the Continental Indoor Football League (CIFL), joining in 2006 as an expansion team.
 The Mayhem were the first professional indoor football team to be based in Marion, but were the second pro football team to be based in the area since the NFL's Oorang Indians.
 The team folded during the 2010 season due to financial problems.
 The Owners of the Mayhem were Michael Burtch and Stanley Jackson.
 They played their home games at the Veterans Memorial Coliseum in Marion, Ohio.
The Lehigh Valley Steelhawks are a professional indoor football team based in Allentown, Pennsylvania and are members of the National Arena League (NAL).
 The Steelhawks began play as an expansion team in the Indoor Football League (IFL) in 2011.
 The Steelhawks moved to the Professional Indoor Football League (PIFL) in 2013, where they made their only championship game appearance to date, losing PIFL Cup III to the Nashville Venom.
 The team joined American Indoor Football for the 2016 season after the PIFL folded.
 The Steelhawks are the Lehigh Valley's second indoor football team, following the defunct Lehigh Valley Outlawz of the Continental Indoor Football League (2005–2008).
 Both teams played their home games at Stabler Arena.
 The owner of the Steelhawks is Glenn Clark.
 The Steelhawks play their home games at the PPL Center.