When the arnis is discovered?

Arnis, also known as Eskrima or Kali, is a Filipino martial art that emphasizes weapon-based fighting, particularly with sticks and bladed weapons. Its origins date back to pre-colonial times in the Philippines, but it was formally recognized and documented during the Spanish colonial period in the 16th century. The art has evolved over centuries, incorporating various influences and techniques, and remains an important cultural and martial heritage in the Philippines today.