Taekwon-Do and Tae Kwon Do, in my opinion are two different animals. Back in 1961, the KTA( Korea Tae Soo Do Assosiation)voted on the name Tae Soo Do to unite the different Kwans. On the other hand Gen. Choi wanted unity under one style, Taekwon-Do. The Kwans didn't want to change what they were teaching and only wanted to unite the Kwans. Even in the late 1960's there was talk between the KTA and ITF until Dr. Kim became President of the KTA. Then cooperation stopped and Gen. Choi left Korea in 1972.