Proclamation No. 216 was the 2017 proclamation of martial law and suspension of the privilege of the writ of habeas corpus in the whole of Mindanao amid clashes between government forces and Maute group terrorists in Marawi, issued by Philippine President Rodrigo Duterte on May 23, 2017. The state of martial law was extended thrice by Congress at the request of Duterte, citing necessity to quell hostile activities perpetrated by terrorist groups, and ended with the third extension lapsing on December 31, 2019.

Dawlah Islamiya, also called Islamic State of Lanao and formerly named as the Maute Group, is a radical Islamist group composed of former Moro Islamic Liberation Front guerrillas and foreign fighters. Based in Lanao del Sur, it was founded by brothers Abdullah and Omar Maute. The organization, which also conducted a protection racket operation in the municipality of Butig, clashes on several occasions with the Armed Forces of the Philippines, the most significant of which began in May 2017 and culminated in the siege of Marawi.