Siege of Fallujah (2016)

Siege of Fallujah (2016) The siege of Fallujah in 2016 was a major Iraqi-led military operation to encircle and retake the city of Fallujah from Islamic State of Iraq and the Levant insurgents, occurring during the wider Anbar campaign (2015–2016) and the War in Iraq (2013–2017). The operation involved elements of the Iraqi Army, Iraqi Counter-Terrorism Service, Popular Mobilization Forces, and allied militia leaders, and preceded a larger offensive to recapture Mosul and other IS-held cities. The siege had significant implications for regional actors including Iran, United States forces, and neighbouring states such as Jordan and Saudi Arabia.

Background

Fallujah, a city in Al Anbar Governorate, had been a focal point of conflict since the Iraq War and the Iraqi insurgency (2011–2013), earlier witnessing the First Battle of Fallujah and Second Battle of Fallujah (2004). Following the rise of Islamic State of Iraq and the Levant in 2014, Fallujah fell under IS control during the Northern Iraq offensive (June 2014) and served as a staging area for operations across Anbar province and toward Baghdad. The city's occupation linked to broader dynamics involving Sunni insurgent groups, the Syrian Civil War, and transnational jihadist networks like Al-Qaeda in Iraq and regional patrons including Iranian Revolutionary Guard Corps. Pressure mounted on the Iraqi Prime Minister Haider al-Abadi to retake Fallujah ahead of planned operations on Mosul and to secure supply lines for the Baghdad-Ramadi axis.

Prelude and Encirclement

In the weeks leading to May 2016, Iraqi security forces, including the Iraqi Army, Iraqi Ministry of Interior forces, and the Iraqi Special Operations Forces, conducted operations to isolate Fallujah. The encirclement followed the liberation of Ramadi in December 2015 and clashes in Hit and Al-Qa'im. Coalition air support from the Military intervention against the Islamic State of Iraq and the Levant—involving United States Armed Forces, International Coalition to Liberate Iraq partners, and intelligence inputs from CENTCOM—assisted by surveillance from MQ-9 Reaper and reconnaissance assets, contributed to severing IS supply routes between Fallujah and Anah or Rutbah. Local tribal dynamics, including negotiations with leaders from Dulaim tribes and coordination with Anbar Provincial Council, affected encirclement timing. Reports cited involvement of Iranian-backed elements such as commanders tied to Quds Force and militia leaders affiliated with the Popular Mobilization Forces, raising concerns among United States Department of State and NATO partners about influence in post-conflict governance.

Military Operations

The kinetic phase began with coordinated assaults by the Iraqi Counter-Terrorism Service and Federal Police units, supported by artillery from Iraqi Army brigades and precision strikes by the International Coalition's air component. Urban combat saw house-to-house fighting reminiscent of prior battles like Battle of Mosul (2016–17) and tactics similar to those used in Siege of Kobani, including IS use of improvised explosive devices and tunnel networks. Special operations forces executed targeted raids against IS command nodes; Hashd al-Shaabi elements pushed from western approaches while Iraqi Army 8th Division and 2nd Division (Iraq) conducted clearing operations. Commanders such as Hadi al-Amiri coordinated with counterterrorism leadership under Abadi to synchronize operations with logistics provided by the Iraqi Ministry of Defense and airstrike facilitation by Combined Joint Task Force – Operation Inherent Resolve. The fighting culminated in the fall of fortified neighborhoods, mass surrenders of IS fighters, and the discovery of weapon caches and explosives workshops across the city.

Humanitarian Impact and Civilian Casualties

The siege generated a humanitarian crisis affecting residents of Fallujah and displaced populations within Al Anbar Governorate. Humanitarian agencies including UNAMI, International Committee of the Red Cross, UNHCR, and International Organization for Migration reported mass displacement to camps in Khalidiya and Amriyat al-Fallujah. Civilian casualty estimates varied, with reports from Human Rights Watch and Amnesty International documenting deaths, injuries, and alleged violations including use of heavy ordnance in populated areas. Basic services in Fallujah—already strained since the Iraqi Civil War (2014–2017) onset—collapsed, with shortages of water, medical supplies, and food prompting concerns raised by World Health Organization and United Nations Office for the Coordination of Humanitarian Affairs. Reconstruction and clearance of unexploded ordnance engaged specialized teams from UNMAS and international demining partners.

Aftermath and Strategic Consequences

The Iraqi victory in Fallujah reshaped the operational environment ahead of the Battle of Mosul (2016–17), denying Islamic State of Iraq and the Levant a strategic bastion near Baghdad and securing key transport routes along the Euphrates River. Politically, the operation affected the standing of Haider al-Abadi domestically and influenced relations with regional actors such as Iran, United States, Turkey, and Saudi Arabia. Reconstruction needs prompted involvement from the United Nations Development Programme, World Bank, and bilateral donors, while governance questions involved the Anbar Provincial Council and national ministries. Security concerns persisted, with residual IS insurgent activity and sectarian tensions involving Sunni communities and Popular Mobilization Forces presence, drawing scrutiny from Human Rights Watch and Amnesty International. The liberation of Fallujah became a prelude to larger counter-IS campaigns across Nineveh Governorate and informed subsequent doctrine for urban operations by the Iraqi Armed Forces and international partners.

Category:Battles of the War in Iraq (2013–2017) Category:2016 in Iraq Category:Fallujah