Chang Hon style Taekwon-do was created by General Choi Hong Hi shortly after the Japanese occupation of Korea during WWII.

It has its roots in Shotokan Karate and Taekyyon, and was  developed by him and other members of the Korean armed forces under the direction of Choi.

It is the original form of Taekwon-do and more aggressive than it's Olympic counterpart, Kukkiwon.

ITF Taekwon-do follows the principles of physics and a thorough understanding of human anatomy, to mold the hands and feet into powerful and efficient weapons  for  self-defense.