The Humvee replacement process, undertaken by the U.S. military, was an effort to replace the current AM General Humvee multi-purpose motor vehicle. The Humvee had evolved several times since its introduction in 1984, and is now used in tactical roles for which it was not originally intended. The U.S. military pursued several initiatives to replace it, both in the short and long term. The short-term replacement efforts utilize commercial off-the-shelf (COTS) vehicles, while the long-term efforts focused on building requirements for the Humvee replacement and technology research and evaluation in the form of various prototype vehicles.