[19] In April, the Wahhabi Maute group pledged allegiance to ISIL along with the Ansar Khalifa Philippines terrorist organization, vowing to provide support for each other.

[26][27] October 19 The Malaysian terrorist Mahmud Ahmad who helped finance the Marawi siege and recruit foreign fighters[28] was killed.

[32] On June 21, 2016, ISIL released a video entitled "The Solid Structure" recognized Abu Sayyaf leader Hapilon as the mujahid authorized to lead the jihadists in the Philippines, and designated him as the emir for Southeast Asia.

[33] In August 2017, another video released by ISIL asks would-be fighters to go to the Philippines, especially the Marawi City where militants are under siege of the government forces.

[35] According to the Daily Mail citing undisclosed Kurdish sources that a Filipino national was among the ISIL members who appeared in a beheading video of American aid worker Peter Kassig and 18 Syrian soldiers uploaded in YouTube.

The following are the list of battle and clashes involving the jihadist groups since they respectively pledged allegiance to ISIS: In a poll conducted between February 16 to May 8, 2017, the Pew Research Center says that 70% among the Filipinos questioned view ISIL as a major threat to the Philippines ahead of global climate change (65%) and cyberattacks (64%).