Choi Hong Hi
Jhoon Rhee was a graduate of the Chung Do Kwan. Thus, Chung Do Kwan is often associated with what Rhee originally taught Americans. Rhee introduced Americans to the Oh Do Kwan Hyungs called Chang Hon, which were developed by Choi Hong Hi, Nam Tae Hi, Han Cha Kyo, Kong Young Il, Choi Chang Keun, Kim Bok Man and Park Jung Tae and are still used by the late Choi's ITF today (Cheon-Ji, Dan-Gun, Do-San, Won-Hyo, Yul-Gok, Jung-Geun, Toi-Gye, Hwa-Rang, Chung-Mu, Gwang-Gae). He did this at the urging of Choi, who wanted Taekwondo to establish its own Korean identity, something it couldn't do with Japanese forms. Jhoon Rhee states that he learned the Chang Hon forms from the South Korean Army Field Manual sent to him by Choi Hong Hi. The Chang Hon set of forms are still taught by independent American Taekwondo instructors who came from the Jhoon Rhee lineage. Rhee's 1970–1971 publication of the Chang Hon forms in a series of 5 separate books through Ohara Publications. Originally the ATA even used the Chang Hon forms until the 1980s, even today there are dozens of private American Taekwondo organizations that trace what they teach, and the forms they use, to a Chung Do Kwan/Chang Hon influence. Such organizations include: ITF, United States Taekwondo Federation (USTF), National Taekwondo Federation of America (NTFA), American Karate and Taekwondo Organization (AKATO), American Karate Black Belt Association (AKBBA), National Progressive Taekwondo Association (NPTA), etc.