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The Iraqi conflict is a series of violent events that began with the 2003 American-led invasion of Iraq and deposition of Iraqi president
Saddam Hussein Saddam Hussein (28 April 1937 – 30 December 2006) was an Iraqi politician and revolutionary who served as the fifth president of Iraq from 1979 until Saddam Hussein statue destruction, his overthrow in 2003 during the 2003 invasion of Ira ...
, followed by a series of conflicts including the protracted
Iraq War The Iraq War (), also referred to as the Second Gulf War, was a prolonged conflict in Iraq lasting from 2003 to 2011. It began with 2003 invasion of Iraq, the invasion by a Multi-National Force – Iraq, United States-led coalition, which ...
(2003–2011), the Iraqi insurgency (2011–2013), the War in Iraq (2013–2017), and most recently, the small-scale Islamic State insurgency in 4 provinces located in Northern Iraq since 2017. In the ensuing 2003–2011
Iraq War The Iraq War (), also referred to as the Second Gulf War, was a prolonged conflict in Iraq lasting from 2003 to 2011. It began with 2003 invasion of Iraq, the invasion by a Multi-National Force – Iraq, United States-led coalition, which ...
, the Multi-National Force (MNF–I) led by the
United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...
helped to establish a Shia-dominated federal government, which was soon opposed by an Iraqi insurgency. Insurgent groups mostly fought the new government and MNF-I, but also each other, mostly along sectarian lines between Shias and Sunnis. In 2011, the MNF–I withdrew from Iraq, leading to renewed sectarian violence and enabling the emergence of the
Islamic State 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 Daesh, is a transnational Salafi jihadism, Salafi jihadist organization and unrecognized quasi-state. IS ...
(IS). The renewed war drew an American-led intervention in 2014. The most recent war in the country came to a close in 2017 as the Iraqi government and its allies largely defeated the IS, which was followed by a low-level IS insurgency in certain rural northern parts of the country.


Background

The main rationale given by the United States for its invasion of Iraq was based on allegations by the American and British governments that
Saddam Hussein Saddam Hussein (28 April 1937 – 30 December 2006) was an Iraqi politician and revolutionary who served as the fifth president of Iraq from 1979 until Saddam Hussein statue destruction, his overthrow in 2003 during the 2003 invasion of Ira ...
was developing
weapons of mass destruction A weapon of mass destruction (WMD) is a Biological agent, biological, chemical weapon, chemical, Radiological weapon, radiological, nuclear weapon, nuclear, or any other weapon that can kill or significantly harm many people or cause great dam ...
and that he thus presented a threat to his neighbors and to the world. The United States stated "on November 8, 2002, the
UN Security Council The United Nations Security Council (UNSC) is one of the six principal organs of the United Nations (UN) and is charged with ensuring international peace and security, recommending the admission of new UN members to the General Assembly, an ...
unanimously adopted Resolution 1441. All fifteen members of the Security Council agreed to give Iraq a final opportunity to comply with its obligations and disarm or face the serious consequences of failing to disarm. The resolution strengthened the mandate of the UN Monitoring and Verification Commission (UNMOVIC) and the
International Atomic Energy Agency The International Atomic Energy Agency (IAEA) is an intergovernmental organization that seeks to promote the peaceful use of nuclear technology, nuclear energy and to inhibit its use for any military purpose, including nuclear weapons. It was ...
(IAEA), giving them authority to go anywhere, at any time and talk to anyone in order to verify Iraq's disarmament." Throughout the early 2000s, the administrations of
George W. Bush George Walker Bush (born July 6, 1946) is an American politician and businessman who was the 43rd president of the United States from 2001 to 2009. A member of the Bush family and the Republican Party (United States), Republican Party, he i ...
and
Tony Blair Sir Anthony Charles Lynton Blair (born 6 May 1953) is a British politician who served as Prime Minister of the United Kingdom from 1997 to 2007 and Leader of the Labour Party (UK), Leader of the Labour Party from 1994 to 2007. He was Leader ...
worked to build a case for invading Iraq, culminating in the U.S. Secretary of State
Colin Powell Colin Luther Powell ( ; – ) was an Americans, American diplomat, and army officer who was the 65th United States secretary of state from 2001 to 2005. He was the first African-American to hold the office. He was the 15th National Security ...
's address to the Security Council one month before the invasion. Shortly after the invasion, the
Central Intelligence Agency The Central Intelligence Agency (CIA; ) is a civilian foreign intelligence service of the federal government of the United States tasked with advancing national security through collecting and analyzing intelligence from around the world and ...
, Defense Intelligence Agency, and other intelligence agencies refused to continue to support the allegations related to Iraqi weapons (as well as the Saddam Hussein and al-Qaeda link allegations), at which point the Bush and Blair administrations shifted to secondary rationales for the war, such as the Hussein government's human rights record and promoting democracy in Iraq. Opinion polls showed that people all over the world opposed a war without a UN mandate, and that the view of the United States as a danger to world peace had significantly increased. U.N. Secretary-General
Kofi Annan Kofi Atta Annan (8 April 193818 August 2018) was a Ghanaian diplomat who served as the seventh secretary-general of the United Nations from 1997 to 2006. Annan and the UN were the co-recipients of the 2001 Nobel Peace Prize. He was the founder a ...
described the war as illegal, saying in an interview in 2004 that it was "not in conformity with the Security Council." Revelations of faulty evidence and shifting rationales became the focal point for critics of the war, who charge that the George W. Bush administration purposely fabricated evidence to justify an invasion that it had long planned to launch. Supporters of the war claim that the threat from Iraq and Saddam Hussein was real and that it had later been established. The U.S. led the effort for "the redirection of former Iraqi weapons of mass destruction (WMD) scientists, technicians and engineers to civilian employment and discourage emigration of this community from Iraq."


Iraq War (2003–2011)


2003 U.S.-led invasion

The invasion of Iraq lasted from 20 March to 15 April 2003 and signaled the start of the
Iraq War The Iraq War (), also referred to as the Second Gulf War, was a prolonged conflict in Iraq lasting from 2003 to 2011. It began with 2003 invasion of Iraq, the invasion by a Multi-National Force – Iraq, United States-led coalition, which ...
, which was dubbed Operation Iraqi Freedom by the
United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...
. The invasion consisted of 26 days of major combat operations, in which a combined force of troops from the United States, the United Kingdom,
Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...
and
Poland Poland, officially the Republic of Poland, is a country in Central Europe. It extends from the Baltic Sea in the north to the Sudetes and Carpathian Mountains in the south, bordered by Lithuania and Russia to the northeast, Belarus and Ukrai ...
invaded
Iraq Iraq, officially the Republic of Iraq, is a country in West Asia. It is bordered by Saudi Arabia to Iraq–Saudi Arabia border, the south, Turkey to Iraq–Turkey border, the north, Iran to Iran–Iraq border, the east, the Persian Gulf and ...
and deposed the Ba'athist government of
Saddam Hussein Saddam Hussein (28 April 1937 – 30 December 2006) was an Iraqi politician and revolutionary who served as the fifth president of Iraq from 1979 until Saddam Hussein statue destruction, his overthrow in 2003 during the 2003 invasion of Ira ...
. The invasion phase consisted primarily of a conventionally fought war which included the capture of the Iraqi capital of
Baghdad Baghdad ( or ; , ) is the capital and List of largest cities of Iraq, largest city of Iraq, located along the Tigris in the central part of the country. With a population exceeding 7 million, it ranks among the List of largest cities in the A ...
by American forces with the assistance of the United Kingdom, Australia and Poland. 160,000 troops were sent by the Coalition into Iraq during the initial invasion phase, which lasted from 20 March to 15 April 2003. About 130,000 were sent from the US, with about 28,000 British, 2,000 Australian, and 194 Polish soldiers. 36 other countries were involved in its aftermath. In preparation for the invasion, 100,000 U.S. troops were assembled in
Kuwait Kuwait, officially the State of Kuwait, is a country in West Asia and the geopolitical region known as the Middle East. It is situated in the northern edge of the Arabian Peninsula at the head of the Persian Gulf, bordering Iraq to Iraq–Kuwait ...
by 18 February. The coalition forces also received support from Kurdish irregulars in
Iraqi Kurdistan Iraqi Kurdistan or Southern Kurdistan () refers to the Kurds, Kurdish-populated part of northern Iraq. It is considered one of the four parts of Greater Kurdistan in West Asia, which also includes parts of southeastern Turkey (Northern Kurdist ...
. The invasion was preceded by an
airstrike An airstrike, air strike, or air raid is an offensive operation carried out by aircraft. Air strikes are delivered from aircraft such as blimps, balloons, fighter aircraft, attack aircraft, bombers, attack helicopters, and drones. The official d ...
on the Presidential Palace in Baghdad on 20 March 2003. The following day, coalition forces launched an incursion into
Basra Province Basra Governorate ( ), also called Basra Province, is a governorate in southern Iraq in the region of Arabian Peninsula, bordering Kuwait to the south and Iran to the east. The capital is the city of Basra, located in the Basrah district. Other ...
from their massing point close to the Iraqi-Kuwaiti border. While the special forces launched an amphibious assault from the
Persian Gulf The Persian Gulf, sometimes called the Arabian Gulf, is a Mediterranean seas, mediterranean sea in West Asia. The body of water is an extension of the Arabian Sea and the larger Indian Ocean located between Iran and the Arabian Peninsula.Un ...
to secure
Basra Basra () is a port city in Iraq, southern Iraq. It is the capital of the eponymous Basra Governorate, as well as the List of largest cities of Iraq, third largest city in Iraq overall, behind Baghdad and Mosul. Located near the Iran–Iraq bor ...
and the surrounding petroleum fields, the main invasion army moved into southern Iraq, occupying the region and engaging in the Battle of Nasiriyah on 23 March. Massive air strikes across the country and against Iraqi command and control threw the defending army into chaos and prevented an effective resistance. On 26 March, the 173rd Airborne Brigade was airdropped near the northern city of
Kirkuk Kirkuk (; ; ; ) is a major city in northern Iraq, serving as the capital of the Kirkuk Governorate. The city is home to a diverse population of Kurds, Iraqi Turkmen, Iraqi Turkmens and Arabs. Kirkuk sits on the ruins of the original Kirkuk Cit ...
, where they joined forces with Kurdish rebels and fought several actions against the
Iraqi Army The Iraqi Ground Forces (Arabic: القوات البرية العراقية), also referred to as the Iraqi Army (Arabic: الجيش العراقي), is the ground force component of the Iraqi Armed Forces. It was formerly known as the Royal Iraq ...
to secure the northern part of the country. The main body of coalition forces continued their drive into the heart of Iraq and met with little resistance. Most of the Iraqi military was quickly defeated and Baghdad was occupied on 9 April. Other operations occurred against pockets of the Iraqi army, including the capture and occupation of Kirkuk on 10 April, and the attack and capture of
Tikrit Tikrit ( ) is a city in Iraq, located northwest of Baghdad and southeast of Mosul on the Tigris River. It is the administrative center of the Saladin Governorate. In 2012, it had a population of approximately 160,000. Originally created as a f ...
on 15 April. Iraqi president Saddam Hussein and the central leadership went into hiding as the coalition forces completed the occupation of the country. On 1 May, an end of major combat operations was declared, ending the invasion period and beginning the
military occupation Military occupation, also called belligerent occupation or simply occupation, is temporary hostile control exerted by a ruling power's military apparatus over a sovereign territory that is outside of the legal boundaries of that ruling pow ...
period.


Anti–coalition insurgency

Invading U.S.-led forces were unable to immediately fill the power vacuum caused by the sudden collapse of a highly centralized state authority, resulting in weeks of virtual anarchy. The rampant looting during this time period, and the inability of U.S.-led forces to control the situation, led to Iraqi resentment. Additionally, the unexpectedly quick implosion of Saddam Hussein's regime meant that the invading forces never engaged and decisively defeated his army in any major battle; the Iraqi army forces simply melted away, often with their weapons, back to their homes. Another cause of resentment was the lack of immediate humanitarian aid and reconstruction efforts for Iraqis suffering from the invasion, the long-term effects of the repression and mismanagement of the Saddam Hussein regime, and international sanctions. A number of factions felt suspicious of long-term American intentions; the conduct of some American soldiers also served to heighten tensions. The de-Ba'athification Commission set up by the
Coalition Provisional Authority The Coalition Provisional Authority (; , CPA) was a Provisional government, transitional government of Iraq established following the 2003 invasion of Iraq, invasion of the country on 19 March 2003 by Multi-National Force – Iraq, U.S.-led Co ...
, the nature of selection of the Governing Council, and other policy decisions were interpreted by Sunni Arabs as actions intended to single out their community for discrimination; this encouraged the beginnings of sectarian tensions. In May 2003, after the Iraqi conventional forces had been defeated and disbanded, the U.S. military noticed a gradually increasing flurry of attacks on U.S. troops in various regions of the so-called "
Sunni Triangle The Sunni Triangle is a densely populated region of Iraq to the north and west of Baghdad inhabited mostly by Sunni Muslim Arabs. The roughly triangular area's points are usually said to lie near Baghdad (the southeast point), Ramadi (the southwes ...
", especially in
Baghdad Baghdad ( or ; , ) is the capital and List of largest cities of Iraq, largest city of Iraq, located along the Tigris in the central part of the country. With a population exceeding 7 million, it ranks among the List of largest cities in the A ...
and in the regions around
Fallujah Fallujah ( ) is a city in Al Anbar Governorate, Iraq. Situated on the Euphrates, Euphrates River, it is located roughly to the west of the capital city of Baghdad and from the neighboring city of Ramadi. The city is located in the region ...
and
Tikrit Tikrit ( ) is a city in Iraq, located northwest of Baghdad and southeast of Mosul on the Tigris River. It is the administrative center of the Saladin Governorate. In 2012, it had a population of approximately 160,000. Originally created as a f ...
. The U.S. military blamed the attacks on remnants of the
Ba'ath Party The Arab Socialist Ba'ath Party ( ' ), also known simply as Bath Party (), was a political party founded in Syria by Michel Aflaq, Salah al-Din al-Bitar, and associates of Zaki al-Arsuzi. The party espoused Ba'athism, which is an ideology ...
and the Fedayeen Saddam militia. Tensions between U.S. forces and the residents of Fallujah were especially severe, with crowd riots and small skirmishes commonplace. Members of insurgent groups came from a variety of sources. Former members of the security services of the Ba'ath regime, former military officers, and some other Ba'ath Party members are cited as members of insurgent groups; indeed, these elements formed the primary backbone of the nascent insurgency. Initially, most former members of the Ba'ath Party and former Iraqi soldiers expressed a willingness to compromise with the Coalition forces. However, many lost their jobs and pensions with the disbanding of the Iraqi army by
Paul Bremer Lewis Paul Bremer III (born September 30, 1941) is a retired American diplomat. He was the second ''de facto'' head of state of Iraq as leader of the Coalition Provisional Authority (CPA) following the 2003 invasion of Iraq by the United State ...
; this, and the unwillingness of the Coalition Provisional Authority to negotiate with former Ba'ath elements, provided impetus for the initial insurgency. While 80% of the army officers were Sunni, the rank and file of the regular army was 80% Shia. Prisoners let out of prison by
Saddam Hussein Saddam Hussein (28 April 1937 – 30 December 2006) was an Iraqi politician and revolutionary who served as the fifth president of Iraq from 1979 until Saddam Hussein statue destruction, his overthrow in 2003 during the 2003 invasion of Ira ...
before his disappearance provided another source both of insurgent recruits and of organized crime factions. Finally, as O'Hanlan says, the porous borders of Iraq and the subsequent foreign insurgents also bolstered the insurgency. Resistance to U.S.-led forces would not for long be confined to the Sunni regions of Iraq. Between 2003 and 2004, Shiite dissatisfaction with the occupation, especially among the urban poor, had been gradually increasing for some of the same reasons it had been among the Sunnis: the perception that the Coalition had failed to deliver on its promises and a nationalist dissatisfaction with foreign occupation. Many young men without jobs or prospects and who had lost faith with the promises of the U.S. began to become drawn to Shiite Islamism, especially of the brand advocated by the cleric
Muqtada al-Sadr Muqtada al-Sadr (; born 4 August 1974) is an Iraqi Shia Muslim cleric, politician and militia leader. He inherited the leadership of the Sadrist Movement from his father, and founded the now dissolved Mahdi Army militia in 2003 that resisted ...
. Sadr's distinguished family background, and his fiery anti-occupation rhetoric and calls for the implementation of
Islamic law Sharia, Sharī'ah, Shari'a, or Shariah () is a body of religious law that forms a part of the Islamic tradition based on scriptures of Islam, particularly the Qur'an and hadith. In Islamic terminology ''sharīʿah'' refers to immutable, intan ...
, caused him to emerge as the leader of this portion of Iraqi Shiite society. In June 2003, after being rejected from a spot on the Iraqi Governing Council, he had created a militia known as the
Mahdi Army The Mahdi Army () was an Iraqi Shia militia created by Muqtada al-Sadr in June 2003 and disbanded in 2008. The Mahdi Army rose to international prominence on April 4, 2004, when it spearheaded the first major armed confrontation against the ...
, whose mission he said was to help keep order and cleanse Iraq of "evil." Since that point, the U.S. had regarded him as a threat, but was divided on whether or not to proceed with a crackdown. Eventually, as Sadr's rhetoric heated and his militia paraded through Sadr City in what seemed like a challenge to the United States, they decided to begin to squeeze his movement. On March 29, they moved to close Sadr's newspaper known as "al-Hawza" and arrested one of his aides on murder charges. That, combined with his steadily decreasing political prospects for success within the U.S.-backed interim government, pushed Sadr to decide for armed revolt. On April 4, the Mahdi Army was directed to begin launching attacks on coalition targets and to seize control from the nascent U.S.-trained Iraqi security forces. The Mahdi Army, which by then numbered from 3,000 to 10,000 men, organized quickly escalating violent riots and then a coordinated assault, surprising coalition and Iraqi forces and seizing control of
Najaf Najaf is the capital city of the Najaf Governorate in central Iraq, about 160 km (99 mi) south of Baghdad. Its estimated population in 2024 is about 1.41 million people. It is widely considered amongst the holiest cities of Shia Islam an ...
,
Kufa Kufa ( ), also spelled Kufah, is a city in Iraq, about south of Baghdad, and northeast of Najaf. It is located on the banks of the Euphrates, Euphrates River. The estimated population in 2003 was 110,000. Along with Samarra, Karbala, Kadhimiya ...
, al-Kut, and parts of Baghdad and southern cities like
Nasiriyah Nasiriyah ( , ; , BGN: , ), also spelled Nassiriya or Nasiriya, is a city in Iraq, the capital of the Dhi Qar Governorate. It lies on the lower Euphrates, about south-southeast of Baghdad, near the ruins of the ancient city of Ur. Its po ...
,
Amarah Amarah (), also spelled Amara, is a city in south-eastern Iraq, located on a low ridge next to the Tigris River waterway south of Baghdad about 50 km (31 mi) from the border with Iran. It lies at the northern tip of the marshlands between ...
, and
Basra Basra () is a port city in Iraq, southern Iraq. It is the capital of the eponymous Basra Governorate, as well as the List of largest cities of Iraq, third largest city in Iraq overall, behind Baghdad and Mosul. Located near the Iran–Iraq bor ...
. A widespread collapse of the Iraqi security forces ensued, with most deserting or defecting to the rebels rather than fighting. Soon, combat was erupting in many urban centers of southern and central portions of Iraq as U.S. forces attempted to maintain control and prepared for a counteroffensive. At the same time, the Sunni insurgency was rapidly intensifying. On March 31, 2004, four private military contractors working for the U.S. military were killed and subsequently mutilated by insurgents and a crowd of residents in the city of Fallujah, long a particularly troublesome center of Sunni resistance to the U.S. presence. On the same day, 5 U.S. soldiers were killed by a large IED on a road a few miles outside of the city. The attacks took place as the
Marines Marines (or naval infantry) are military personnel generally trained to operate on both land and sea, with a particular focus on amphibious warfare. Historically, the main tasks undertaken by marines have included Raid (military), raiding ashor ...
were taking over responsibility for al-Anbar province, in which Fallujah is located, from the U.S. Army. The intended Marine strategy of patrols, less aggressive raids,
humanitarian aid Humanitarian aid is material and Humanitarian Logistics, logistic assistance, usually in the short-term, to people in need. Among the people in need are the homelessness, homeless, refugees, and victims of natural disasters, wars, and famines. Th ...
, and close cooperation with local leaders was quickly suspended and the U.S. decided that it was time for a major assault to clear the city of insurgents. On April 4, U.S. and Iraqi forces launched Operation Vigilant Resolve to retake the city, which had clearly fallen completely into rebel hands. They met very stiff and well-organized resistance from the guerrillas. After three days of fighting with the U.S. Marines, the insurgents still held three-quarters of the city. Cases of widespread reach and planning, suggesting national insurgent coordination, were noted. Hundreds of insurgents cut the road between Fallujah and Baghdad to the east, while west of Fallujah in
Ramadi Ramadi ( ''Ar-Ramādī''; also formerly rendered as ''Rumadiyah'' or ''Rumadiya'') is a city in central Iraq, about west of Baghdad and west of Fallujah. It is the capital and largest city of Al Anbar Governorate which shares borders with Syri ...
, over 150 insurgents launched an offensive against U.S. Marine positions. A similar attack followed, conducted by about 150 insurgents, against U.S. Marines near the Syrian border in al-Qaim. The assaults were beaten back, but the U.S. toll from the combined attacks numbered in the dozens. Political pressure began to build on the United States and the Governing Council of Iraq as the hospital of Fallujah continued to report high numbers of civilian casualties, inflaming further the Iraqi people and Muslim world in general. After two weeks of fighting, the U.S. Marines were on the verge of capturing, but had not yet taken central control of, the city of Fallujah. Pentagon leaders, fearing that continuing the effort to capture the city might further inflame a larger revolt against Coalition authority, pulled back the forces. The Marines were ordered to stand-down and cordon off the city on April 30, where they would remain in a perimeter around the city for the following six months. A compromise on April 30 was reached in order to ensure security within Fallujah itself by creating the "Fallujah Brigade", a unit that drew from former members of Iraq's Army, local volunteers, and even the insurgents themselves. The unit's formation was part of a truce negotiation. This unit was to act under the control of the Coalition Provisional Authority, patrol alongside the Iraqi Police and National Guardsmen but maintain its autonomy. The Fallujah Brigade had many former Saddam loyalists. From various reports, Brigade members re-integrated themselves into the insurgent outfits that dominated. The city remained under the control of insurgent forces. Reportedly,
Abu Musab al-Zarqawi Abu Musab al-Zarqawi (; , "Father of Musab, of Zarqa"; October 30, 1966 – June 7, 2006), born Ahmad Fadeel Nazal al-Khalayleh (), was a Jordanian militant jihadist who ran a training camp in Afghanistan. He became known after going to Iraq a ...
's organization was among the several that exercised some authority in the area. By the end of the spring uprising, the cities of Fallujah,
Samarra Samarra (, ') is a city in Iraq. It stands on the east bank of the Tigris in the Saladin Governorate, north of Baghdad. The modern city of Samarra was founded in 836 by the Abbasid caliph al-Mu'tasim as a new administrative capital and mi ...
, Baquba, and Ramadi had been left under Sunni guerrilla control with American patrols in the cities ceased. The insurgency had undergone another major shift, as insurgent organizations now had safe havens in cities such as Fallujah to develop and coordinate with each other. Zarqawi's group and its allies were in a period of uneasy cooperation with other insurgent groups dominated by nationalist and Ba'athist agendas, although the groups increasingly came into competition for territory within Sunni insurgent-controlled areas. U.S. forces launched only occasional armored forays into Samarra and Baquba, while about half a dozen small forts were maintained by the U.S. Marines in Ramadi, with the surrounding territory in the city controlled by rebels. American ground forces remained outside of Fallujah, though regular air strikes were conducted on alleged safehouses of Abu Musab al-Zarqawi's followers in the city. With the battle for Fallujah over, the Sunni insurgency continued against the U.S. forces remaining outside these cities as the guerrillas resumed their tactics of using IED's and mortars to attack U.S. forces indirectly, for the most part avoiding direct combat. Meanwhile, the fighting continued in the Shiite south. Over the next three months, over 1,500 Mahdi Army militiamen, several hundred civilians, and dozens of coalition soldiers were killed as the U.S. gradually took back the southern cities. On June 6, a truce was reached, temporarily ending the fighting. On June 28, 2004, the occupation was formally ended by the Coalition, which transferred power to a new
Iraqi government The government of Iraq is defined under the current Constitution, approved in 2005, as a democratic, parliamentary republic with Islam as the official state religion. The government is composed of the executive, legislative, and judicial branche ...
led by
Prime Minister A prime minister or chief of cabinet is the head of the cabinet and the leader of the ministers in the executive branch of government, often in a parliamentary or semi-presidential system. A prime minister is not the head of state, but r ...
Ayad Allawi. Although many Iraqis were optimistic about the government, militants saw it as little more than an American puppet and continued the fight unabated. On July 18, guerrillas offered a $285,000 reward for Allawi's assassination.


Sectarian civil war

In February 2006, unknown assailants bombed the minarets of
al-Askari Mosque Al-Askari Shrine, the Askariyya Shrine, or Al-Askari Mosque is a Shia Muslim mosque and mausoleum in the Iraqi city of Samarra from Baghdad. It is one of the most important Shia shrines in the world. It was built in 944. The dome was destroy ...
in
Samarra Samarra (, ') is a city in Iraq. It stands on the east bank of the Tigris in the Saladin Governorate, north of Baghdad. The modern city of Samarra was founded in 836 by the Abbasid caliph al-Mu'tasim as a new administrative capital and mi ...
, which is regarded as a holy site by Twelver Shi'ites. While no group claimed responsibility, U.S. military and Iraqi Transitional government officials attributed the attacks to Sunni militants linked to
Al-Qaeda in Iraq Al-Qaeda in Iraq (; AQI), was a Salafi jihadism, 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 targ ...
. The incident set off a wave of Shi'a assaults against Sunnis followed by Sunni counterattacks. The conflict escalated over the next several months until by 2007, the
National Intelligence Estimate National Intelligence Estimates (NIEs) are United States federal government documents that are the authoritative assessment of the Director of National Intelligence (DNI) on intelligence related to a particular national security issue. NIEs are pr ...
described the situation as having elements of a
civil war A civil war is a war between organized groups within the same Sovereign state, state (or country). The aim of one side may be to take control of the country or a region, to achieve independence for a region, or to change government policies.J ...
. In 2008 and 2009, during the Sunni Awakening and following a surge in US soldiers stationed in the country, violence declined dramatically. However, low-level strife continued to plague Iraq until the U.S. withdrawal in late 2011. In October 2006, the Office of the United Nations High Commissioner for Refugees (UNHCR) and the
Iraqi government The government of Iraq is defined under the current Constitution, approved in 2005, as a democratic, parliamentary republic with Islam as the official state religion. The government is composed of the executive, legislative, and judicial branche ...
estimated that more than 370,000 Iraqis had been displaced since the 2006 bombing of the al-Askari Mosque, bringing the total number of Iraqi
refugee A refugee, according to the United Nations High Commissioner for Refugees (UNHCR), is a person "forced to flee their own country and seek safety in another country. They are unable to return to their own country because of feared persecution as ...
s to more than 1.6 million. By 2008, the UNHCR raised the estimate of refugees to a total of about 4.7 million (~16% of the population). The number of refugees estimated abroad was 2 million (a number close to CIA projections) and the number of internally displaced people was 2.7 million. The estimated number of orphans across Iraq has ranged from 400,000 (according to the Baghdad Provincial Council), to five million (according to Iraq's anti-corruption board). A UN report from 2008 placed the number of orphans at about 870,000. The
Red Cross The organized International Red Cross and Red Crescent Movement is a Humanitarianism, humanitarian movement with approximately 16million volunteering, volunteers, members, and staff worldwide. It was founded to protect human life and health, to ...
stated in 2008 that Iraq's humanitarian situation was among the most critical in the world, with millions of Iraqis forced to rely on insufficient and poor-quality water sources. According to the Failed States Index, produced by
Foreign Policy Foreign policy, also known as external policy, is the set of strategies and actions a State (polity), state employs in its interactions with other states, unions, and international entities. It encompasses a wide range of objectives, includ ...
magazine and the
Fund for Peace The Fund for Peace is an American non-profit, non-governmental research and educational institution. Founded in 1957, FFP "works to prevent violent conflict and promote sustainable security." The Fund for Peace works towards sustainable security ...
,
Iraq Iraq, officially the Republic of Iraq, is a country in West Asia. It is bordered by Saudi Arabia to Iraq–Saudi Arabia border, the south, Turkey to Iraq–Turkey border, the north, Iran to Iran–Iraq border, the east, the Persian Gulf and ...
was one of the world's top 5 unstable states from 2005 to 2008. A poll of top U.S. foreign policy experts conducted in 2007 showed that over the next 10 years, just 3% of experts believed the U.S. would be able to rebuild Iraq into a "beacon of democracy" and 58% of experts believed that Sunni–Shiite tensions would dramatically increase in the Middle East. Two polls of Americans conducted in 2006 found that between 65% and 85% believed
Iraq Iraq, officially the Republic of Iraq, is a country in West Asia. It is bordered by Saudi Arabia to Iraq–Saudi Arabia border, the south, Turkey to Iraq–Turkey border, the north, Iran to Iran–Iraq border, the east, the Persian Gulf and ...
was in a civil war. However, a similar poll of Iraqis conducted in 2007 found that 61% did not believe that they were in a civil war.


Withdrawal of western coalition forces

The withdrawal of U.S. military forces from
Iraq Iraq, officially the Republic of Iraq, is a country in West Asia. It is bordered by Saudi Arabia to Iraq–Saudi Arabia border, the south, Turkey to Iraq–Turkey border, the north, Iran to Iran–Iraq border, the east, the Persian Gulf and ...
was a contentious issue in the United States for much of the 2000s. As the war progressed from its initial invasion phase in 2003 to a nearly decade-long occupation, American public opinion shifted towards favoring a troop withdrawal; in May 2007, 55% of Americans believed that the
Iraq War The Iraq War (), also referred to as the Second Gulf War, was a prolonged conflict in Iraq lasting from 2003 to 2011. It began with 2003 invasion of Iraq, the invasion by a Multi-National Force – Iraq, United States-led coalition, which ...
was a mistake, and 51% of registered voters favored troop withdrawal. In late April 2007
Congress A congress is a formal meeting of the representatives of different countries, constituent states, organizations, trade unions, political parties, or other groups. The term originated in Late Middle English to denote an encounter (meeting of ...
passed a supplementary spending bill for Iraq that set a deadline for troop withdrawal but President Bush vetoed this bill, citing his concerns about setting a withdrawal deadline. The Bush Administration later sought an agreement with the Iraqi government, and in 2008
George W. Bush George Walker Bush (born July 6, 1946) is an American politician and businessman who was the 43rd president of the United States from 2001 to 2009. A member of the Bush family and the Republican Party (United States), Republican Party, he i ...
signed the U.S.–Iraq Status of Forces Agreement. It included a deadline of 31 December 2011, before which "all the United States Forces shall withdraw from all Iraqi territory". The last U.S. troops left Iraq on 18 December 2011, in accordance with this agreement.


War in Iraq (2013–2017)

The military campaigns launched by the
Islamic State of Iraq and 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 Daesh, is a transnational Salafi jihadist organization and unrecognized quasi-state. IS occupied signif ...
in late 2013 were very successful, and the group took swathes of territory in northern Iraq during 2014. Violence reached very high levels, with 1,775 people killed in the month of June alone. These figures remained very high for the remainder of the year. The 2017 Iraqi–Kurdish conflict occurred in and around the Kurdish region of northern
Iraq Iraq, officially the Republic of Iraq, is a country in West Asia. It is bordered by Saudi Arabia to Iraq–Saudi Arabia border, the south, Turkey to Iraq–Turkey border, the north, Iran to Iran–Iraq border, the east, the Persian Gulf and ...
that began on 15 October 2017, shortly after the
independence referendum An independence referendum is a type of referendum in which the residents of a territory decide whether the territory should become an Independence, independent sovereign state. An independence referendum that results in a vote for independenc ...
was held on September 25. After the independence referendum, Prime Minister Haider al-Abadi demanded the referendum to be canceled. In October, the Iraqi military moved into the Kurdistan region after the entry of the Islamic State. On 16 October 2017, the Kurdish
Peshmerga The Peshmerga () are the internal security forces of Kurdistan Region. According to the Constitution of Iraq, regional governments are responsible for "the establishment and organization of the internal security forces for the region such as p ...
ignored a deadline given by Iraq to withdraw. This led to Battle of Kirkuk (2017), and Iraqi forces and Iranian-backed PMU retaking Kirkuk and its province on 15 October 2017. Within 15 hours, the city of
Kirkuk Kirkuk (; ; ; ) is a major city in northern Iraq, serving as the capital of the Kirkuk Governorate. The city is home to a diverse population of Kurds, Iraqi Turkmen, Iraqi Turkmens and Arabs. Kirkuk sits on the ruins of the original Kirkuk Cit ...
and the nearby
K-1 Air Base K-1 Air Base, or Kaywan, is a former Iraqi Air Force base and military base in the Kirkuk Governorate of Iraq. It was captured by Multi-National Force – Iraq, Coalition forces during Operation Iraqi Freedom in 2003, later served as the headq ...
, along with surrounding oilfields, were retaken by Iraqi forces. This resulted in the conflict's end. On December 9, 2017, the last areas held by the Islamic State in the al-Jazira Desert were captured by the Iraqi military. Prime minister Haider al-Abadi announced the military defeat of the Islamic State in Iraq.


Continued Islamic State insurgency (2017–present)

Following IS's defeat in December 2017, the group has continued an insurgency mostly in the rural parts of the country. However they have been greatly weakened and violence in Iraq has been sharply reduced in 2018. 95 people died during the month of May 2018 from violence-related crimes, the lowest figure in 10 years.


Notes


References

{{DEFAULTSORT:Iraqi conflict 2000s conflicts 2000s in Iraq 2010s conflicts 2010s in Iraq 2020s conflicts 2020s in Iraq 21st century in Iraq 21st-century conflicts Civil wars in Iraq History of Iraq (1958–present) Operation Inherent Resolve Religion-based wars Religiously motivated violence in Iraq Shia–Sunni sectarian violence War on terror Wars involving Iran Wars involving Iraq Wars involving the states and peoples of Asia Wars involving the United Kingdom Wars involving the United States Wars involving France Wars involving Saudi Arabia Wars involving Turkey Wars involving Kurdistan Region (Iraq)