Korosu is a martial art that is made up of various offensive and defensive maneuvers; in some cases, weapons are also incorporated. This martial art is usually trained by those involved in espionage, counterintelligence Corps and the border guards and KGB agents. This system was founded in the 1940s by a personnel officer of the Soviet Military espionage department, Colonel Nilopor Korotki(1908-1971). It is based on the various systems of self-defense and attack, both without weapons and with various weapons and firearms.