The Rampage were originally owned by Pro Soccer International, a group managed by Michael O'Flaherty and Oscar Albuquerque, a former member of the former National Professional Soccer League's Illinois Thunder and the 1980 Canadian Olympic qualifying team.

On March 10, 2007, after defeating the Cincinnati Excite 5-4 with a late goal by Ante Cop, the Thunder secured a position in the AISL finals to face the Massachusetts Twisters.

[1][2] On September 9, 2008, the Rampage announced they were joining the new National Indoor Soccer League for its inaugural season in 2008-09.

On July 7, 2009, it was announced that the Rockford Rampage acquired the Chicago Magic youth soccer club and its nationally recognized Development Academy and structured them as a non-profit organization.

[3] On August 21, 2012, the Rampage joined the Professional Arena Soccer League for the 2012-2013 season.