The Pata Island massacre refers to an event that took place on February 12, 1981, on Pata Island, Sulu province in the Philippines. More than 100 Philippine Army officers and men were killed by Moro natives in what was called by retired Major General Delfin Castro as "the biggest number of casualties incurred by the Armed Forces of the Philippines in a single incident since the start of the conflict in Mindanao and had the dubious distinction of achieving the biggest losses in AFP firearms and equipment in a single incident." An estimated 3,000 Tausug civilians, including women and children, were killed in months of shelling by military forces in 1982 and was tagged as the Pata Island massacre.