Battle of Baiji (2014–2015)

Battle of Baiji (2014–2015)
Jim Gordan, USACE · Public domain · source
Conflict	Battle of Baiji (2014–2015)
Partof	Iraqi Civil War (2014–2017)
Date	2014–2015
Place	Baiji, Saladin Governorate, Iraq
Result	See Aftermath and significance
Combatant1	Islamic State of Iraq and the Levant; Sunni insurgents
Combatant2	Iraqi Armed Forces; Iraqi Police; Popular Mobilization Forces; Kurdistan Regional Government Peshmerga; United States Armed Forces; International Coalition against Daesh
Commander1	Abu Bakr al-Baghdadi (nominal)
Commander2	Haider al-Abadi; Izzat Ibrahim al-Douri (notorious figure influencing operations); Qassem Soleimani (adviser role reported); Raymond Thomas (SOF coordination)
Units1	Islamic State of Iraq and the Levant forces
Units2	Iraqi Army; Iraqi Air Force; Hashd al-Shaabi; Golden Division (Iraq); Special Operations Forces
Casualties1	See Casualties and impact
Casualties2	See Casualties and impact

Battle of Baiji (2014–2015). The Battle of Baiji (2014–2015) was a protracted confrontation over the city of Baiji and the adjacent Baiji oil refinery, fought between Islamic State of Iraq and the Levant forces and Iraqi-aligned troops including the Iraqi Army, Iraqi Police, Peshmerga, and Shia Popular Mobilization Forces with assistance from the United States Armed Forces and the International Coalition against Daesh. The contest became emblematic of the Iraqi Civil War (2014–2017) struggle for control of energy infrastructure and northern Iraq territorial lines, drawing in regional actors and international airpower.

Background

Baiji, sited on the Tigris River north of Samarra and south of Tikrit, held the largest refinery in Iraq, the Baiji oil refinery, a strategic asset for Iraqi oil production and distribution. Following rapid advances by Islamic State of Iraq and the Levant during the Northern Iraq offensive (2014) and the collapse of Iraqi security forces in Mosul, ISIL targeted Baiji in an effort to secure oil revenue and transportation routes connecting Kirkuk and Baghdad. The fall or defense of Baiji was linked to operations like the Siege of Tikrit (2014) and later the Battle of Tikrit (2015), with United States Armed Forces and coalition airstrikes increasingly involved after appeals by Haider al-Abadi and regional partners.

Forces and commanders

On the ISIL side, command was attributed to cadre loyal to Abu Bakr al-Baghdadi and regional emirs who coordinated assaults using foreign fighters and captured military hardware from the Iraqi Army. Defenders included units from the Iraqi Army, elements of the Iraqi Police, and elite formations such as the Golden Division (Iraq), backed by pro-government militias in the Popular Mobilization Forces like Asa'ib Ahl al-Haq and Badr Organization. The Peshmerga contributed pressure from northern axes, while the United States Central Command directed airstrike campaigns alongside advisory and special operations elements. Iranian-linked figures including Qassem Soleimani were reported to have had advisory roles coordinating Shia militias and liaising with Haider al-Abadi’s administration. International actors such as the United Kingdom Armed Forces and France provided intelligence and limited strikes under the International Coalition against Daesh umbrella.

Course of the battle

ISIL launched repeated assaults in late 2014, initially seizing parts of Baiji and encircling the Baiji oil refinery, prompting fierce counterattacks by the Iraqi Army and allied militias. Urban combat featured close-quarters fighting in districts, use of improvised explosive devices, and sabotage of refinery infrastructure similar to tactics seen in the Siege of Kobani and Battle of Mosul (2016–2017). Control of the refinery oscillated: ISIL attacked refinery precincts, Iraqi forces mounted counterattacks supported by Iraqi Air Force and coalition airstrikes, while Peshmerga blocked northern reinforcement routes. Winter operations culminated in a major government offensive in late 2014 and early 2015 coinciding with the Battle of Tikrit (2015), as Hashd al-Shaabi and the Golden Division (Iraq) pushed to retake areas around Baiji. The refinery complex was subjected to arson, looting, and explosive damage; supply lines through Salah ad Din Governorate were contested by ISIL ambushes and suicide bombing attacks. By late 2015, Iraqi-aligned forces had secured most urban areas and the refinery, though ISIL retained insurgent capabilities in surrounding deserts and villages, foreshadowing the Anbar campaign (2015).

Casualties and impact

The battle produced significant human and material losses. Combatant casualties included hundreds of fighters from ISIL and Iraqi forces, with reports of mass arrests, executions, and prisoner transfers reminiscent of ISIL conduct in Fallujah and Ramadi. Civilian casualties were substantial, with deaths, injuries, and displacement of local populations to Salah ad Din Governorate and Nineveh Governorate displacement sites. Damage to the Baiji oil refinery degraded Iraqi oil output and strained revenues, affecting reconstruction funding and humanitarian relief supported by organizations such as UNAMI and United Nations agencies. The use of airstrikes by the International Coalition against Daesh raised debates in parliaments including United Kingdom Parliament and United States Congress over rules of engagement and post-conflict stabilization similar to discussions after the 2011 military intervention in Libya.

Aftermath and significance

By late 2015 Iraqi-aligned forces declared Baiji and the refinery under government control, marking a symbolic shift in momentum against ISIL after campaigns like the Battle of Tikrit (2015) and preceding major offensives such as the Battle of Ramadi (2015–2016). The recapture contributed to broader efforts by Haider al-Abadi to reconstitute state authority and to the strategy of the International Coalition against Daesh to sever ISIL revenue streams. Long-term consequences included protracted reconstruction of the refinery with involvement from Iraqi ministries and international contractors, ongoing security operations by the Iraqi Army and Hashd al-Shaabi, and legal and political repercussions within Iraq regarding militia integration and provincial governance reform. The Battle of Baiji became a case study in hybrid urban warfare, combining insurgent asymmetric tactics, conventional counteroffensives, and international airpower coordination, influencing later operations such as the Siege of Mosul (2016–2017) and shaping regional alignments involving Iran and Western coalition partners.

Category:Battles of the Iraqi Civil War (2014–2017)