Developed in Soviet-era Russia for use by their army, S.A.M.B.O is a martial art rooted in groundwork, combining the ground fighting and grappling aspects of judo and wrestling, such as throws and submission holds. It also incorporates standing techniques such as punching, kicking, knee strikes, and elbow strikes. Despite originally being used by the military, it later became a popular competitive sport made famous by fighter such as Khabib Nurmagomedov & Islam Makhachev.