Though somewhat difficult to handle, the Super Sabre afforded so much lifting power that it could carry the same payload as a WWII bomber, a load that it could deliver with incredible speed and precision. Adapted as a fighter bomber, the F-100 would be supplanted by the Mach 2 class F-105 Thunderchief for strike missions over North Vietnam. The F-100 flew extensively over South Vietnam as the Air Force's primary close air support jet until replaced by the more efficient subsonic A-7 Corsair 2. The F-100 also served in several NATO air forces and with other US allies. In its later life, it was often referred to as "the Hun," a shortened version of "one hundred."