The so-called Jabiddah “Massacre” happened which resulted to the death of at least 23 trainees on Corregidor island which is believed to have sparked the Muslim rebellion and gave birth to the Moro National Liberation Front (MNLF).

Source: M.D.Vitug & G.M.Gloria, Under The Crescent Moon; Rebellion Mindanao; Ateneo Center for Social Policy and Public Affairs