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.
Taekwondo
The oldest Korean martial arts were an amalgamation of unarmed combat styles developed by the three rival Korean Kingdoms of Goguryeo, Silla, and Baekje, where young men were trained in unarmed combat techniques to develop strength, speed, and survival skills. The most popular of these techniques were ssireum, subak, and taekkyeon. The Northern Goguryeo kingdom was a dominant force in Northern Korea and North Eastern China prior to the 1st century CE, and again from the 3rd century to the 6th century. Before the fall of the Goguryeo Dynasty in the 6th century, the Shilla Kingdom asked for help in training its people for defence against pirate invasions. During this time a few select Silla warriors were given training in taekkyeon by the early masters from Goguryeo. These Silla warriors then became known as Hwarang or "blossoming knights." The Hwarang set up a military academy for the sons of royalty in Silla called Hwarang-do {花郎徒}, which means "flower-youth corps." The Hwarang studied taekkyeon, history, Confucian philosophy, ethics, Buddhist morality, social skills, and military tactics. The guiding principles of the Hwarang warriors were based on Won Gwang's five codes of human conduct and included loyalty, filial duty, trustworthiness, valour, and justice.
In spite of Korea's rich history of ancient and martial arts, Korean martial arts faded during the late Joseon Dynasty. Korean society became highly centralized under Korean Confucianism, and martial arts were poorly regarded in a society whose ideals were epitomized by its scholar-kings.