Hummer was a marque of trucks sold by General Motors that marketed three vehicles: the original Hummer H1 based on the military High Mobility Multipurpose Wheeled Vehicle (HMMWV, or Humvee), along with the Hummer H2 and the Hummer H3 — based on other, smaller civilian-market vehicles. Hummers were originally built by AM General Corporation, which was formerly AMC-Jeep's General Products division, in its Mishawaka, Indiana, assembly plant.