The most serious militant action by the Islamic State (IS) terrorist group during its so called, Ramadan Jihad‟ was the siege of Marawi, the capital city of Lanao del Sur province in the Southern Philippine island of Mindanao. On 23 May, Marawi became the
first city outside the Middle East and North Africa to fall to IS, after the „Islamic State
Lanao‟ (ISL) fighters took over the city.1 With more than a month after the siege, the
continuing battle in Marawi between the US supported local military and police forces and
the IS foreign and domestic fighters bears some similarities with the battles in Aleppo,
Mosul, Raqqa and other war-torn cities in Iraq and Syria.
The battle in Marawi has a significant impact on extremists in Southeast Asia and beyond. It indicates that despite government efforts, the IS threat is growing both in the physical and virtual space. IS supporters have created telegram groups, which include "Expansion of the Caliphate in East Asia", "Sharq Asia and East Asia Wilayah" that focus on attracting foreign recruits to travel to the Philippines. These groups have also encouraged fighters to attack the Philippines, their own countries and people of other faiths. Even after IS fighters are defeated and pushed out from Marawi, the ideological ambitions of such groups will continue to pose a serious threat to security.