section_path: History/Modern history/20th century (1914 to 1989)
section_name: 20th century (1914 to 1989)
paragraph_text: 20th century (1914 to 1989)
  
  The International Boxing Association was established in 1920. World Fencing Championships have been held since 1921.
  
  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–1960s. 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.
  
  The later 1960s and 1970s witnessed an increased media interest in Chinese martial arts, influenced by martial artist Bruce Lee. Bruce Lee is credited as one of the first instructors to openly teach Chinese martial arts to Westerners. World Judo Championships have been held since 1956, Judo at the Summer Olympics was introduced in 1964. Karate World Championships were introduced in 1970.
  
  The " kung fu wave " of Hong Kong action cinema in the 1970s, especially Bruce Lee films, popularized martial arts in global popular culture. A number of mainstream films produced during the 1980s also contributed significantly to the perception of martial arts in Western popular culture. These include The Karate Kid (1984) and Bloodsport (1988). This era produced some Hollywood action stars with martial arts background, such as Jean-Claude Van Damme and Chuck Norris.
  
  Also during the 20th century, a number of martial arts were adapted for self-defense purposes for military hand-to-hand combat. World War II combatives, KAPAP (1930s) and Krav Maga (1950s) in Israel, Systema in Soviet-era Russia, and Sanshou in the People's Republic of China are examples of such systems. The US military de-emphasized hand-to-hand combat training during the Cold War period, but revived it with the introduction of LINE in 1989.