The martial art of Tang Soo Do is relatively modern, but it's roots lie in the ancient Korean art of Soo Bahk Do, which can be traced back many centuries. Tang Soo Do is a style composed from three major areas and styles, which are Soo Bahk Do (60%), Northern China Kung Fu (30%) and Southern China Kung Fu (10%).
Tang Soo Do is both a 'hard' and a 'soft' style of martial art, with the hard external influence coming from the Soo Bahk and the soft internal from the Northern Chinese systems. Both of which can easily be recognised in the Hyungs (forms) that are practised within the style.