Over its fifty-year history, the MiG-15 aircraft has gained wide worldwide fame and does not need any special introduction. It became the first mass-produced jet fighter, which was in service with both the USSR Air Force and many other countries of the world. Much has been written about the MiG-15, but, unfortunately, mainly about its service outside the Soviet Union. We think there is no need to bother the reader with a retelling of foreign publications about the work on the production, improvement and operation of the aircraft in Poland, Czechoslovakia and other countries; there is already plenty of material on this. Therefore, we will focus on the little-known pages of the biography of the “fifteenth” in the USSR, as well as its combat work in the skies of the Korean Peninsula in 1950-53.