The 177th Fighter Aviation Regiment PVO was a fighter regiment of the Soviet Air Defense Forces during World War II and the Cold War, later becoming part of the Russian Air Defense Forces and finally the Russian Air Force.

The Mikoyan-Gurevich MiG-9 was the first turbojet fighter developed by Mikoyan-Gurevich in the years immediately after World War II. It used reverse-engineered German BMW 003 engines. Categorized as a first-generation jet fighter, it suffered from persistent problems with engine flameouts when firing its guns at high altitudes due to gun gas ingestion. A number of different armament configurations were tested, but none solved the problem. Several different engines were evaluated, but none were flown as the prototype of the MiG-15 promised superior performance.