Islamic State of Iraq in the context of "Islamic State in Iraq and the Levant"

The Islamic State (IS), also known as the Islamic State of Iraq and the Levant (ISIL), the Islamic State of Iraq and Syria (ISIS) and the Daesh, is a transnational Salafi jihadist militant organisation and an unrecognised quasi-state. IS occupied significant territory in Iraq and Syria in 2013, but lost most of it between 2017 and 2019. In 2014, the group proclaimed itself to be a worldwide caliphate, and claimed religious and political authority over all Muslims worldwide, a claim not accepted by the vast majority of Muslims. It is designated as a terrorist organisation by the United Nations and many countries around the world, including Muslim countries.

By the end of 2015, its self-declared caliphate ruled an area with a population of about 12 million, where they enforced their extremist interpretation of Islamic law, managed an annual budget exceeding US$1 billion, and commanded more than 30,000 fighters. After a grinding conflict with American, Iraqi, and Kurdish forces, IS lost control of all its Middle Eastern territories by 2019, subsequently reverting to insurgency from remote hideouts while continuing its propaganda efforts. These efforts have garnered a significant following in northern and Sahelian Africa, where IS still controls a significant territory. Originating in the Jaish al-Ta'ifa al-Mansurah founded by Abu Omar al-Baghdadi in 2004, the organisation (primarily under the Islamic State of Iraq name) affiliated itself with al-Qaeda in Iraq and fought alongside them during the 2003–2006 phase of the Iraqi insurgency. The group later changed their name to Islamic State of Iraq and Levant for about a year, before declaring itself to be a worldwide caliphate, called simply the Islamic State (الدولة الإسلامية, ad-Dawlah al-Islāmiyya).

Baqubah (Arabic: بَعْقُوبَة; BGN: Ba‘qūbah; also spelled Baquba and Baqouba) is the capital of the Diyala Governorate of Iraq. The city is located some 50 km (31 mi) to the northeast of Baghdad, on the Diyala River. In 2003 it had an estimated population of some 280,000 people.

Baqubah served as a way station between Baghdad and Khorasan on the medieval Khorasan Road. During the Abbasid Caliphate, it was known for its date and fruit orchards, irrigated by the Nahrawan Canal. It is now known as the centre of Iraq's commercial orange groves. During the Iraq war, Baqubah served the capital of Al Qaeda in Iraq as well as the Islamic State of Iraq, the predecessors of the Islamic State.

The Iraqi civil war was a short armed conflict from 2006 to 2008 between various sectarian Shia and Sunni armed groups, such as the Islamic State of Iraq and the Mahdi Army, in addition to the Iraqi government alongside American-led coalition forces. In February 2006, the insurgency against the coalition and government escalated into a sectarian civil war after the bombing of Al-Askari Shrine, considered a holy site in Twelver Shi'ism. US President George W. Bush and Iraqi officials accused Al-Qaeda in Iraq (AQI) of orchestrating the bombing. AQI publicly denied any links. The incident set off a wave of attacks on Sunni civilians by Shia militants, followed by attacks on Shia civilians by Sunni militants.

The UN Secretary General stated in September 2006 that if patterns of discord and violence continued, the Iraqi state was in danger of breaking up. On 10 January 2007, Bush said that "80% of Iraq's sectarian violence occurs within 30 miles (48 km) of the capital. This violence is splitting Baghdad into sectarian enclaves, and shakes the confidence of all Iraqis." By late 2007, the National Intelligence Estimate described the conflict as having elements of a civil war. In 2008, during the Sunni Awakening and the U.S. troop surge, violence declined dramatically. However, an insurgency by ISI continued to plague Iraq following the U.S. withdrawal in late 2011. In June 2014, the Islamic State of Iraq and the Levant, the successor to Islamic State of Iraq, launched a major military offensive against the Iraq government and declared a self-proclaimed worldwide Islamic caliphate. This led to another full-scale war from 2013 to 2017, in which the government declared victory.

Al-Qaeda in Iraq (Arabic: القاعدة في العراق, romanized: Al-Qāʿidah fī al-ʿIrāq; AQI), was a Salafi jihadist organization affiliated with al-Qaeda. It was founded on 17 October 2004, and was led by Abu Musab al-Zarqawi until its disbandment on 15 October 2006 after he was killed in a targeted bombing on 7 June 2006 in Hibhib, Iraq by the United States Air Force.

The group was started as Jama'at al-Tawhid wal-Jihad in 1999. In 2004 it pledged allegiance to Osama bin Laden's al-Qaeda. Under the leadership of al-Zarqawi, AQI was engaged in various militant activities during the early stages of the Iraqi insurgency, with the objective of expelling the U.S.-led coalition and establishing an Islamic state in Iraq. In January 2006, AQI and seven other Sunni guerrilla groups formed the Mujahideen Shura Council (MSC), which on 15 October 2006 disbanded to form the "Islamic State of Iraq."

Ibrahim Awwad Ibrahim Ali al-Badri (28 July 1971 – 27 October 2019), commonly known by his nom de guerre Abu Bakr al-Baghdadi, was an Iraqi militant leader and former teacher who was the founder and first leader of the Islamic State (IS), who proclaimed himself caliph in 2014 and stayed in power until his suicide in an American operation in 2019.

Baghdadi was born in Samarra and obtained graduate degrees in Islamic theology in the late 1990s and 2000s. According to supporters, he obtained a PhD at the Islamic University of Baghdad. Following the American invasion of Iraq in March 2003, Baghdadi led the "Jama'at Jaysh Ahl al-Sunna wal-Jama'ah" insurgent group in Iraq and was detained with al-Qaeda commanders at the American Camp Bucca in 2004. His group joined the Mujahideen Shura Council (MSC) coalition in 2006 and fought alongside al-Qaeda in Iraq. Upon the dissolution of the MSC in October 2006, Baghdadi became a leading member of the newly established Islamic State of Iraq organization, and rose through the group's ranks until he was appointed its emir, the highest leader, in 2010. In March 2013, the group renamed itself as the "Islamic State of Iraq and Levant" (ISIL), announcing its intention to expand into Syria and forcibly assimilate the Al-Nusra Front, leading to a conflict with al-Qaeda's general command. In June 2014, the group once again re-designated itself as the "Islamic State", and declared itself to be a caliphate. Baghdadi was chosen caliph of the Islamic State by a "Shura Council", which represented those members of the Islamic State allegedly qualified to elect a caliph.

Following the outbreak of the protests of Syrian revolution during the Arab Spring in 2011 and the escalation of the ensuing conflict into a full-scale civil war by mid-2012, the Syrian Civil War became a theatre of proxy warfare between various regional powers such as Turkey and Iran. Spillover of the Syrian civil war into the wider region began when the Iraqi insurgent group known as the Islamic State of Iraq (ISI) started intervening in the conflict in 2012.

In 2012, ISI began transporting its fighters, arms and supplies to Syria. In April 2013, ISI renamed itself as the "Islamic State of Iraq and Levant" (ISIL), officially announcing its expansion into Syria. Throughout 2013, ISIL fought Syrian opposition groups, gaining control of numerous hamlets, villages, towns and cities in eastern and northern Syria. In late 2013, ISIL launched its Anbar campaign into regions of Western Iraq and captured Fallujah in January 2014. In June 2014, ISIL captured vaste swathes of territory during its Northern Iraq offensive, culminating in the capture of Mosul. On 29 June 2014, the group renamed itself as the "Islamic State" (IS) and declared itself as a Caliphate.

Abu Omar al-Baghdadi (Arabic: أبو عمر البغدادي, romanized: ʾAbū ʿUmar al-Baghdādī; /ˈɑːbuː ˈoʊmɑːr ɑːl bɑːɡˈdɑːdi/ AH-boo OH-mar ahl bahg-DAHD-ee; 1964 – 18 April 2010), born Hamid Dawud Mohamed Khalil al-Zawi (Arabic: حَامِدُ دَاوُدَ مُحَمَّدُ خَلِيلِ ٱلزَّاوِيِّ, romanized: Ḥamīd Dāwud Muḥammad Ḵalīl az-Zāwī) was an Iraqi militant who was the Emir of the Islamic militant umbrella organization Mujahideen Shura Council (MSC), and its successor, the Islamic State of Iraq (ISI), which fought against the U.S.-led Coalition forces during the Iraqi insurgency.