Also in 1959 he wrote the first book on Taekwon - Do .
Also in 1959 he led the Military Taekwon - Do Demonstration Team to Vietnam and Taiwan , marking the first time ever Taekwon - Do was performed abroad .
Also in 1959 he wrote the first book on Taekwon - Do and led the Military Taekwon - Do Demonstration Team to Vietnam and Taiwan , marking the first time ever Taekwon - Do was performed abroad .