In 1966 , some members of the KTA , led by H.H. Choi , broke off from the KTA .
In 1966 , some members of the KTA , led by H.H. Choi , formed the International Taekwon - Do Federation ( ITF ) .
In 1966 , some members of the KTA , led by H.H. Choi , broke off from the KTA and formed the International Taekwon - Do Federation ( ITF ) .