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In Greek mythology, it was said that the heroes Heracles and Theseus invented pankration as a result of using both wrestling and boxing in their confrontations with opponents.

The athletes used boxing and wrestling techniques, but also others, such as kicking and holds, joint-locks and chokes on the ground.

https://en.wikipedia.org/wiki/Pankration

The term come from the Greek πᾶν (pan) "all" and κράτος (kratos) "powerful/mighty/strength", similar to the Chinese "supreme ultimate".