Warren Rodwell, Australian soldier, educator and musician
Abu Sayyaf ( (listen); Arabic: جماعة أبو سياف; Jamāʿat Abū Sayyāf, ASG), officially known by the Islamic State as the Islamic State – East Asia Province, is a Jihadist militant and pirate group that follows the Wahhabi doctrine of Sunni Islam. It is based in and around Jolo and Basilan islands in the southwestern part of the Philippines, where for more than four decades, Moro groups have been engaged in an insurgency seeking to make Moro Province independent. The group is considered violent and was responsible for the Philippines' worst terrorist attack, the bombing of Superferry 14 in 2004, which killed 116 people. The name of the group is derived from the Arabic abu (Arabic: أبو); "father of"), and sayyaf (Arabic: سيّاف; "swordsmith"). As of June 2021, the group is estimated to have less than 50 members, down from 1,250 in 2000. They use mostly improvised explosive devices, mortars and automatic rifles.

Since its inception in 1989, the group has carried out bombings, kidnappings, assassinations and extortion. They have been involved in criminal activities, including rape, child sexual assault, forced marriage, drive-by shootings and drug trafficking. The goals of the group "appear to have alternated over time between criminal objectives and a more ideological intent".The group has been designated as a terrorist group by Australia, Canada, Indonesia, Japan, Malaysia, the Philippines, the United Arab Emirates, the United Kingdom and the United States. From January 15, 2002, to February 24, 2015, fighting Abu Sayyaf became a mission of the American military's Operation Enduring Freedom and part of the global war on terrorism. Several hundred United States soldiers were stationed in the area to mainly train local forces in counter-terror and counterguerrilla operations, but, following a status of forces agreement and under Philippine law, they were not allowed to engage in direct combat.The group was founded by Abdurajak Abubakar Janjalani, and led after his death in 1998 by his younger brother Khadaffy Janjalani until his death in 2006. On July 23, 2014, Isnilon Hapilon, one of the group's leaders, swore an oath of loyalty to Abu Bakr al-Baghdadi, the leader of the Islamic State (IS). In September 2014, the group began kidnapping people for ransom, in the name of the IS.