Developed in the 1960s as the first truly successful V/STOL combat aircraft, the Hawker Siddeley Harrier proved a revelation upon entering service in its earliest from, the GR.1. However, some improvements could be made and this came in the GR.3, which featured better sensor in the nose and tail, as well as a more powerful version of the Rolls Royce Pegasus engine. The GR.3 was the first of the Harrier variants to see combat, joining Operation Corporate, the re-taking of the Falkland Islands, engaging Argentinian Forces in ground attack missions. Replaced by the GR.5 Harrier II, the GR.3 proved itself to be a capable and successful aircraft.