Here is what we know about why he declared martial law and what happens next:What happened to trigger martial law? READ: Martial law declared in Mindanao; Duterte to fly back home from MoscowDuterte’s declaration fulfilled an often-repeated promise to impose martial law to combat the IS-linked militants, whom he has said are a growing threat to national security. But he has said many times that martial law may be needed to solve many other problems, including illegal drugs. READ: Mindanao martial law to be ‘as harsh’ as that of Marcos — DuterteWhat happens next? The post-Marcos constitution imposed safeguards on martial law, including the requirement for congress to approve its imposition and extension.

Source: Philippine Daily Inquirer May 24, 2017 07:30 UTC