The LTV A-7 Corsair II completed up being a light assault aircraft based on the F-8 Crusader. The A-7 wound up being among the primary combat aircraft to feature a head-up display (HUD). doppler-bounded inertial navigation system, and a turbofan engine. It served with both united states Navy as well as the usa Air Force, and immediately after using the Air nationwide Guard. It ended up additionally exported to South Vietnam (through the Vietnam War), Greece (A-7H), Portugal(A-7P), and Thailand (into the belated 1980s)