The Franchise joined the North American Hockey League for the 2003–04 season as the Texarkana Bandits. The team played in Texarkana from 2003 until the summer of 2006 when the team moved to the Greater St. Louis Metro Area. The team moved to the Summit Center in Chesterfield, Missouri, filling the void left when the St. Louis Heartland Eagles of the USHL ceased operations at the end of the 2005 season. In 2007 & 2008, former head coach and general manager Jon Cooper coached the team to Back-to-back Robertson Cup National Championships.
The team has made appearances in the NAHL playoff rounds each of their five years in the NAHL. In 2007 they claimed the South Division Title and in 2008 claimed the North Division Title. The Bandits moved back to the South division for the 2008-09 season. They once again moved to the Central Division for the 2010–11 season. The team hosted the Robertson Cup Championships at the Hardee's IcePlex in May 2008 where they became Back-to-Back National Championships. The 2008–09 season the Bandits headed to Mason City, Iowa for the Robertson Cup Championships and yet again took home the most coveted award in the NAHL. The three-peat was clinched with a 3–2 overtime win against the West Division Champion, Wenatchee Wild.
The Franchise has seen many successes since The Bandits began in 2003. In their first season in the league the team was the only expansion team to make the playoffs. The team has made the playoffs every season since the team joined the league. In May 2007 the St. Louis Bandits became NAHL champions and Tier II Junior A Hockey National Champions. The Bandits remained strong for the 2007–08 season and won back-to-back Robertson Cup Champions when they hosted it at the Hardee's IcePlex in May 2008. In 2009, the Bandits kept the winning tradition alive by capturing the Robertson Cup for a third consecutive season . St. Louis beat the Wenatchee Wild in the championship game by a score of 3-2 with an overtime goal by Clinton Bourbonais.