The Mikoyan MiG-31, NATO reporting name Foxhound, is a supersonic interceptor aircraft developed by the Soviet Union's Mikoyan Design Bureau. It is one of the fastest and highest-flying military aircraft in the world. The MiG-31 was designed to replace the earlier MiG-25 Foxbat interceptor and is specifically tailored for long-range interception missions.

Key features of the MiG-31 include its powerful radar system, the Zaslon S-800, which enables it to detect and track multiple targets at extended ranges. The aircraft is armed with a combination of long-range air-to-air missiles, such as the R-33 and R-37, making it capable of engaging targets at great distances.

Notably, the MiG-31 has a two-seat configuration, with a pilot and a weapons systems officer. This dual-pilot setup facilitates the management of complex missions and enhances the overall effectiveness of the aircraft.

Introduced into service in the late 1970s, the MiG-31 has undergone several upgrades to maintain its relevance and effectiveness. It has served in the air defense forces of both the Soviet Union and later the Russian Federation. The MiG-31's combination of speed, altitude capability, and advanced radar systems makes it a formidable interceptor in the realm of aerial defense.