The first flight of the MiG-21, made by Mikoyan-Gurevich OKB, was in 1955 and induction into the Soviet Union air force began in 1959. Russia retired its MiG-21s in the 1990s.
The MiG-21, despite its lack of sophisticated avionics, was agile and extremely uncomplicated to manufacture. This made it a valuable military export for the Soviet Union to many countries, more than 30 and in particular India and China.