Catch wrestling is a popular style of wrestling. Catch wrestling is arguably the ancestor of modern professional wrestling and mixed martial arts competitions. Catch wrestling's origins lie in a variety of styles, most notably the regional wrestling styles of Europe, particularly the British Isles (e.g. Collar-and-elbow, Lancashire catch-as-catch-can submission wrestling etc.) and Asia (e.g. pehlwani).

Defendo is a martial art and self defense system created in 1945 for law enforcement by Bill Underwood , a British born Canadian . Underwood was originally the creator of Combato a "non- boxing or wrestling " unarmed combat system which he taught in Montreal , Quebec .

The Marine Corps Martial Arts Program (MCMAP) is a combat system developed by the United States Marine Corps to combine existing and new hand-to-hand and close quarters combat (CQC) techniques with morale and team-building functions and instruction in what the Marine Corps calls the "Warrior Ethos". The program, which began in 2001, trains Marines (and U.S. Navy personnel attached to Marine Units) in unarmed combat, edged weapons, weapons of opportunity, and rifle and bayonet techniques. It also stresses mental and character development, including the responsible use of force, leadership, and teamwork. The MCMAP program has several nicknames, including "semper fu", MCSlap, and "new bushido ". In speech, the acronym is often pronounced "mick-map."

Combatives is a term popularized by the US Army for hand-to-hand combat training . It now encompasses various hybrid martial arts , which incorporate techniques from several different martial arts and combat sports . Unlike combat sports, such systems usually have limited sport application and often focus on simple techniques for use in self-defense or combat .