Systema (Russian: Система, romanized: Sistema, lit. 'system') is a Russian martial art, since 1993. There are multiple schools of systems that began appearing after the end of the Soviet Union in the 1990s, with teachers claiming their respective "systems" (usually named after themselves).^{[citation needed]} Training includes, but is not limited to: hand-to-hand combat, grappling, knife fighting, and firearms training. Training involves drills and sparring without set kata.