War against the Islamic State: Philippine defense secretary Delfin Lorenzana declares the end of the Siege of Marawi.

Many states began to intervene against the Islamic State, in both the Syrian civil war and the War in Iraq (2013–2017), in response to its rapid territorial gains from its 2014 Northern Iraq offensives, universally condemned executions, human rights abuses and the fear of further spillovers of the Syrian civil war. In later years, there were also minor interventions by some states against IS-affiliated groups in Nigeria and Libya. All these efforts significantly degraded the Islamic State's capabilities by around 2019–2020. While moderate fighting continues in Syria, as of 2025, IS has been contained to a small area and force capability.

The Philippines, officially the Republic of the Philippines, is an archipelagic country in Southeast Asia. Located in the western Pacific Ocean, it consists of 7,641 islands, with a total area of roughly 300,000 square kilometers, which are broadly categorized in three main geographical divisions from north to south: Luzon, Visayas, and Mindanao. With a population of over 110 million, it is the world's twelfth-most-populous country.

Delfin Negrillo Lorenzana, OLH, KGOR is a retired Philippine Army general who served as Chairman of the Bases Conversion and Development Authority from 2022 until September 2024. He previously served as Secretary of National Defense in the Cabinet of President Rodrigo Duterte from 2016 to 2022. He served in the Philippine Army from 1973 to 2004.

The siege of Marawi, also known as the Marawi crisis and the Battle of Marawi, was a five-month-long armed conflict in Marawi, Philippines, that started on May 23, 2017, between Philippine government security forces against militants affiliated with the Islamic State (IS), including the Maute and Abu Sayyaf Salafi jihadist groups. The battle also became the longest urban battle in the modern history of the Philippines.