Tang Soo Do (aka Soo Bahk Do - founder renamed it in June 1970, but many that broke off from founder's organization kept the original name) was the style practiced at the Moo Duk Kwan, founded November 9th, 1945 by Hwang Kee (deceased, July 2002). Tae Kwon Do was founded in the latter 1950s by efforts from Korean government and a General Choi Hong Hi of the South Korean army. After the Japanese Occupation of Korea ended in 1945, the cultural ban on Korea by Japan was lifted, and the oppressed Korean arts started to flourish. Martial arts schools opened up everywhere, the main 5 being the Chang Moo Kwan, Chung Do Kwan, Oh Do Kwan, Ji Do Kwan, and the aforementioned Moo Duk Kwan. The Korean government felt that it needed to reestablish the nation's identity through various cultural venues. For martial arts, it meant uniting all the Kwans together under one name, Tae Soo Do (later renamed Tae Kwon Do). Hwang Kee and the Moo Duk Kwan fought for their right to stay separate from the Tae Kwon Do movement in the Korean Supreme Courts and won their battle. Therefore, Tang Soo Do remains a separate art. The World Tae Kwon Do Federation (WTF) style TKD is probably what you refer to as "competition TKD" - training is mainly focused on developing fast economical kicks for competition olympic sparring. WTF TKD is mainly focused on competition, so all training is focused around the framework of the rules of competition, hence little emphasis on hands, groundwork. Tang Soo Do still mostly adheres to its original traditions, opting not to evolve into a sport like TKD (and hence did not lose most of its fighting practicality). Tang Soo Do incorporates more hand techniques and kicking techniques utilizing more hip for power and stability (TKD kicks tend not to since at most amateur and beginner levels, such hip kicking would be slower than the "skip kicking" characteristic of today's olympic TKD). Non competition oriented TKD is hard to find, other than that of the International Tae Kwon Do Federation (ITF) - originally based on the Oh Do Kwan (highly militaristic dojang). Their training is mostly more traditional, resembling Tang Soo Do closer than the WTF Olympic TKD. As for the histories of TKD and TSD, TSD sometimes likes to focus on the fact that they are not sport oriented and how they survived the TKD movement. TKD histories, especially WTF, do not like to focus on the General Choi history. Therefore, history depends on which style, organization, or school you attend, because the first several generations of TKD and TSD practictioners are mostly still alive and will probably shape the history they want passed on to future generations.