The Mace missile was developed from the TM-61 Matador missile, initially called the TM-61B or Matador B, and after several modifications was designated the CGM-13B Mace missile in 1964. It was created to overcome the Matador’s limited-range guidance system, which could easily be jammed, and the difficulty of moving and setting up the missile to fire. The Mace had a redesigned airframe with smaller wings and a longer fuselage, and it was transported fully assembled except for its booster on a zero-length launch trailer. Its most important change was a new guidance system called ATRAN, Automatic Terrain Recognition And Navigation. Flight testing began in 1956, and the Mace A series became operational in 1959. Development of the Mace B series upgrade also began in 1959, replacing the guidance system with the AC Spark Plug AChiever inertial guidance system, which allowed the missile to fly higher at 40,000 feet instead of 1,000 feet and increased its range to 1,500 miles instead of 800 miles. The first operational B series missiles were deployed in 1961. This CGM-13B Mace missile, serial number 59-4860, was manufactured on 14 March 1961. Its first assignment was to the 4504th Tactical Missile Training Wing in Orlando, Florida. In June 1971, it was assigned to the 4571st Drone Missile Squadron, Air Defense Command, at Hurlburt Field, Florida, where it was used extensively as a target drone until it was donated to the AF Museum for display.