The Mamasapano Incident
A Brief Background Story:
A police operation took place on January 25, 2015, at Tukanalipao, Mamasapano, Maguindanao, between the Special Action Force (SAF) of the Philippine National Police (PNP and the Bangsamoro Islamic Freedom Fighters (BIFF) and the Moro Islamic Liberation Front (MILF).
Originally a mission to serve arrest warrants for high-ranking terrorists known as Marwan and it led to the deaths of 44 members of PNP SAF. Fallen44 became a worldwide trend on social media site Twitter as an effort to honor the 44 slain SAF members. The SAF casualties were later dubbed as the Fallen 44.