Pencak Silat Indonesian island, and displays the greatest diversity of techniques. Many Javanese schools such as Perisai Diri and Inti Ombak have been established internationally in Asia, Europe and America. Merpati Putih or "white dove" style was developed in the keraton (royal courts) of 17th century Mataram and was not taught publicly until 1963. Today it is the standard unarmed martial art of the Indonesian National Armed Forces. It includes weapons but focuses more on empty-handed self-defense and the development of internal strength developed through breathing techniques. Pencak silat in Java draws from traditional kejawen and Hindu-Buddhist Javanese beliefs but after Indonesia's
Pencak Silat the specialty of Silat Tapu, a secretive system taught only to experienced practitioners. Located on Sumatra's northwest coast on the westernmost tip of the archipelago, Aceh was the first port of call for traders sailing the Indian Ocean. Local culture and weapons (particularly knives) show distinct Indian-Muslim derivation. Unlike the more typical rattan shield, the Acehnese buckler is identical to the Indian dhal (shield), made from metal and with five or seven knobs on the surface. The Acehnese are recorded by both Indonesian and European sources as being the most warlike people in all of Sumatra, and this is reflected