Tang Soo Do is a Korean martial art based on karate and may include fighting principles from taekkyeon, subak, as well as northern Chinese martial arts. From its beginnings in 1944 to today, Tang Soo Do is used by some Kwans to identify the traditional Korean fusion of martial arts styles. In the mid 1950s, Tang Soo Do became the basis for the martial art Taekwondo when the Korean Nine Kwans unite... Wikipedia