Sambo

Sambo (Russian: са́мбо, IPA: [ˈsambə]; самозащита без оружия) is a Russian martial art and combat sport. It originated in the Russian SFSR in Soviet Union. The word "SAMBO" is an acronym for samozashchita bez oruzhiya, which literally translates as "self-defence without weapons". Sambo is relatively modern, since its development began in the early 1920s by the Soviet Red Army to improve their hand-to-hand combat abilities. It was intended to be a merger of the most effective techniques Source : https://en.wikipedia.org/wiki/Sambo_(martial_art)