Pankration.
Pankration in Greek translates to “full might”. It was a combat sport in ancient Greece, which resembles the modern mixed martial arts in many ways. Any kind of striking was allowed, which included punches and kicks, along with a variety of wrestling and grappling techniques. Fights were ended either by submission, knockout or in some cases, with the death of a fighter. It was also used by the Greek and Macedonian armies in warfare.
Although the ancient art is now extinct, a modern form of Pankration has been revived thanks to a few martial artists and historians who have studied the ancient techniques and have adapted them to our times.