Modern history of East Asian martial arts
Taekwondo was developed from karate for use in the Republic of Korea Armed Forces from 1954. For this purpose, karate terminology needed to be "nationalized". The name "taekwondo" is due to shotokan practitioner and army general Choi Hong Hi. After the Korean War, Taekwondo was further developed into a purely sportive discipline, since 1973 overseen by the World Taekwondo Federation. 
During 1964-1966, Choi Hong Hi continued to promote taekwondo, working to put together a world-class exhibition team. Taekwondo's emphasis on jumping and flying kicks dates to this period. While taekwondo was based off karate, the structural changes made in the 1950s and 1960s were significant, and it cannot now be considered a branch of karate, but is a standalone modern martial art. Taekwondo was presented at the Summer Olympics as a demonstration sport in 1988 and 1992, and became an official Olympic discipline in 2000.
Won Kuk Lee
Won Kuk Lee called his art Tang Soo Do (the “way of the Chinese hand”), which was the Korean pronunciation of the Japanese words “Karate-Do” during the decade of 1920, using the Chinese character TANG (唐). All of the original Tang Soo Do schools taught the original Okinawa-Japanese Kata, dressed in the traditional kimono and taught karate with little influence from the millenary Taekyon martial arts. The peak of the Tang Soo Do Chung Do Kwan started the opening of new schools, ran by direct Won Kuk students or by their technical support and his promotional impulses. That’s how other Kuk Lee’s students established their own schools. Nam Tae-Hi Under the direction of Choi Hong Hi (Ohdokwan), Lee Yong-woo (Jungdokwan), Ko Jae-chun (Chungryongkwan), Kang Suh Chang (Kukmookwan) schools were created and developed.
The Taekwondo is one of the youngest oriental martial arts, and its story started with the opening of the Chung Do Kwan in Seoul in 1944.