Schools that follow the International Taekwon-Do Federation (ITF) tradition typically use the Chang Hon 창헌 (also called Chang Hun, Chang 'On or Chon-Ji) forms that were developed by Choi Hong Hi, Nam Tae Hi, Han Cha Kyo, Choi Chang Keun, Park Won Ha, Woo Jae Lim, Kim Bok Man and Cho Sang Min, and have their roots in the Oh Do Kwan. In addition, Kim J.C., Park Jong Soo, and Lee Byung Moo are thought to have developed four of the Ch'ang Hon patterns (Eui-Am, Moon-Moo, Yong-Gae & So-San) in 1968. 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.