 Park Jung Tae, likely assisted by Choi Jung Hwa (General Choi's son), Michael McCormack (General Choi's son-in-law) and Lim Won Sup, is credited with developing the Juche pattern.Kong Young Il may have helped develop the Ch'ang Hon patterns as well.With the Oh Do Kwan in charge of the taekwondo training in the Korean military, the "Chang Hon hyeong" set of forms spread widely, and they are seen in many taekwondo organizations, including ITF-offshoots such as the Global Taekwondo Federation.