Pankration ( or )(Greek : παγκράτιον) was a sporting event introduced into the Greek Olympic Games in 648 BC and was an empty-hand submission sport with scarcely any rules. The athletes used techniques from boxing and wrestling but also other types, such as kicking and holds, locks and chokes on the ground. The only things not acceptable were biting and gouging out the opponent's eyes. The term comes from the Greek , literally meaning "all of might" from (pan-) "all" and (kratos) "strength, might, power".