The knowledge of making gunpowder-based weapon in Nusantara archipelago has been known after the failed Mongol invasion of Java (1293 A.D.). This resulted in the development of small swivel guns such as cetbang and lantaka. Pole gun (bedil tombak) was recorded as being used by Java in 1413. However the knowledge of making "true" firearms came much later, after the middle of 15th century. It was brought by the Islamic nations of West Asia, most probably the Arabs. The precise year of introduction is unknown, but it may be safely concluded to be no earlier than 1460.