He went on to establish the International Taekwon - Do Federation ( ITF ) the following year .
Choi again became President in 1965 , but was forced to resign after a year , reportedly due to his unpopular authoritarian leadership style .
Choi went on to establish the International Taekwon - Do Federation ( ITF ) the following year .
Choi again became President in 1965 , but was forced to resign after a year , reportedly due to his unpopular authoritarian leadership style .