Sport in South Korea
Taekwondo, a popular martial sport is often claimed to have historical origins on the Korean peninsula with origins said to have been traced as far back as the 1st century BCE. However, such historical claims are difficult to empirically verify and separate from the influences of neighboring counties. The sport rose to prominence following the end of Japanese occupation with the end of WWII. Formalized rules were established in 1961 and in 1988 the sport became an Olympic event. The name "Taekwondo" literally means "way of foot and fist", although the modern emphasis lies on the kicks. This may be a way to help legitimize the sport's connection to the traditional practice called Taekkyeon, which originated in Korea during the Goguryeo period in the 4th century. Taekkyeon uses open hands and the feet, where as the use of clenched fists is not permitted. The motions are smoother and more curvilinear than in Taekwondo. Although both disciplines start with the sound "tae" in English, there is no relationship.
Martial arts
As Western influence grew in Asia a greater number of military personnel spent time in China, Japan and South Korea during World War II and the Korean War and were exposed to local fighting styles. Jujutsu, judo and karate first became popular among the mainstream from the 1950s-60s. Due in part to Asian and Hollywood martial arts movies, most modern American martial arts are either Asian-derived or Asian influenced.
The term kickboxing (キックボクシング) was created by the Japanese boxing promoter Osamu Noguchi for a variant of muay Thai and karate that he created in the 1950s. American kickboxing was developed in the 1970s, as a combination of boxing and karate. Taekwondo was developed in the context of the Korean War in the 1950s.