History of wrestling
When the First Modern Olympic Games held in Athens in 1896, Greco-Roman wrestling was introduced as an Olympic discipline. After not being featured in the 1900 Olympics, sports wrestling was seen again in 1904 in St. Louis; this time in freestyle competition. Since then, Greco-Roman and freestyle wrestling have both been featured (with women's freestyle added in the Summer Olympics of 2004).
Wrestling
Freestyle wrestling is an international discipline and an Olympic sport, for both men and women. This style allows the use of the wrestler's or his opponent's legs in offense and defense. Freestyle wrestling has its origins in catch-as-catch-can wrestling and the prime victory condition in this style involves the wrestler winning by throwing and pinning his opponent on the mat. American high school and college wrestling is conducted under different rules and is termed scholastic and collegiate wrestling. 
Pankration, from the Greek words "pan" and "kratos" meaning "the one who controls everything", is a world heritage martial art with the distinction of being the only martial sport in the ancient Olympic Games from 648 BC to 393 AD. Modern amateur pankration is a form of mixed martial arts (MMA) that incorporates techniques from multiple systems. Matches are fought with both grappling holds and by striking techniques.