The Su-27 is a fourth-generation Soviet fighter jet developed by the Sukhoi Design Bureau to achieve air superiority. It first took to the skies in 1977 and entered service in 1985. Created as a response to the American F-15 and F-14, the Su-27 was distinguished by its long range, high maneuverability, and ability to engage in air combat at both long and short ranges. It became the basis for further modifications, in particular the Su-30, Su-33, Su-34 and Su-35. The Su-27 is still in service in many countries and is considered one of the most successful developments of Soviet aircraft manufacturing.