Corgi Fire Heroes HMMWV Fire Pumper: Chicago Fire Department, O'Hare Airport

The High Mobility Multipurpose Wheeled Vehicle (HMMWV; colloquial: Humvee) is a family of light, four-wheel drive, military trucks and utility vehicles produced by AM General. It has largely supplanted the roles previously performed by the original jeep, and others such as the Vietnam War-era M151 jeep, the M561 "Gama Goat", their M718A1 and M792 ambulance versions, the Commercial Utility Cargo Vehicle, and other light trucks. Primarily used by the United States military, it is also used by numerous other countries and organizations and even in civilian adaptations. The Humvee saw widespread use in the Gulf War of 1991, where it navigated the treacherous desert terrain; this usage helped to inspire civilian Hummer versions. After going through a replacement process, the Joint Light Tactical Vehicle (JLTV) was selected to its successor in front-line service.

The Chicago Fire Department is the second largest municipal fire department in the United States and one of the largest in North America. The Chicago Fire Department is organized in a paramilitary fashion, similar to that of most large municipal fire departments.