The Vietnam War is often referred to as the "Helicopter War," a name that emerged as a result of their active participation in the armed conflict in Indochina. U.S. Army helicopters performed a wide range of different missions, including troop transportation, reconnaissance, fire support, cargo transportation, and search and rescue of downed aircraft crews. A large number of ground personnel, including technicians, mechanics, and weapons specialists, were involved in the maintenance and repair of the helicopters. They were engaged in scheduled maintenance of helicopters, engines and weapons equipment. The technicians also eliminated malfunctions that occurred during combat missions, such as damage to the helicopter fuselage caused by ground fire.