Withdrawal of United States troops from Iraq (2007–2011) in the context of "History of Iraq (2003–2011)"

The Iraq War (Arabic: حرب العراق, romanized: ḥarb al-ʿirāq), also referred to as the Second Gulf War, was a prolonged conflict in Iraq from 2003 to 2011. It began with the invasion by a United States–led coalition, which resulted in the overthrow of the Ba'athist government of Saddam Hussein. The conflict persisted as an insurgency that arose against coalition forces and the newly established Iraqi government. US forces were officially withdrawn in 2011. In 2014, the US became re-engaged in Iraq, leading a new coalition under Combined Joint Task Force – Operation Inherent Resolve, as the conflict evolved into the ongoing Islamic State insurgency.

The Iraq invasion was part of the Bush administration's broader war on terror, launched in response to the September 11 attacks. In October 2002, the US Congress passed a resolution granting Bush authority to use military force against Iraq. The war began on March 20, 2003, when the US, joined by the UK, Australia, and Poland, initiated a "shock and awe" bombing campaign. Coalition forces launched a ground invasion, defeating Iraqi forces and toppling the Ba'athist regime. Saddam Hussein was captured in 2003 and executed in 2006.

The occupation of Iraq (2003–2011) began on 20 March 2003, when the United States invaded with a military coalition to overthrow Iraqi president Saddam Hussein and his Arab Socialist Ba'ath Party, and continued until 18 December 2011, when the final batch of American troops left the country. While the United States, the United Kingdom, and Australia were the largest contributors to the coalition, 29 other countries, such as Japan, were involved in the Iraq War in a lesser capacity. Additionally, several private military contractors took part in enforcing the occupation.

It was a period of violence and political turmoil, and saw strong foreign influence exerted on Iraqi politics. In April 2003, the fall of Saddam's government was formally marked by the establishment of the Coalition Provisional Authority, which later appointed and granted limited powers to the Iraq Interim Governing Council. In June 2004, the Iraqi Interim Government was established, ending the international armed conflict that had existed between Iraq (that is, Ba'athist Iraq) and the United States. Following the January 2005 Iraqi parliamentary election, this administration was replaced by the Iraqi Transitional Government. A year later, the Al Maliki I Government took office.

Fallujah (Arabic: ٱلْفَلُّوجَة al-Fallūjah [el.fɐl.ˈluː.dʒɐ]) is a city in Al Anbar Governorate, Iraq. Situated on the Euphrates River, it is located roughly 69 kilometres (43 mi) to the west of the capital city of Baghdad and 50 kilometres (31 mi) from the neighboring city of Ramadi. The city is located in the region defined as Sunni Triangle by the United States, as the majority of its residents are Sunni Arabs. In 1947, Fallujah was a small town with a relatively small population but had grown to a population of about 250,900 people by 2018.

Following the 2003 invasion of Iraq, which triggered the Iraq War, the city became a major centre of resistance during insurgency. The United States, the United Kingdom, and the Iraqi Interim Government twice engaged in fierce urban combat with insurgents throughout the city; the first battle of Fallujah failed to dislodge the insurgents, triggering the second battle, in which the coalition forces successfully took control of the city. However, heavy fighting from these two battles left the city severely damaged, though it remained occupied by the coalition until 2011. In January 2014, three years after the American withdrawal from Iraq, Fallujah was captured by the Islamic State (IS) and suffered a major population decline. On 23 May 2016, the government announced the beginning of a large-scale military offensive against the IS militants occupying the city, resulting in the Third Battle of Fallujah. On 26 June 2016, the Iraqi Armed Forces stated that Fallujah had been fully liberated and was free from militant control.

The 2003 invasion of Iraq was the first stage of the Iraq War. The invasion began on 20 March 2003 and lasted just over one month, including 26 days of major combat operations, in which a U.S.-led combined force of troops from the United States, the United Kingdom, Australia, and Poland invaded the Republic of Iraq. Twenty-two days after the first day of the invasion, the capital city of Baghdad was captured by coalition forces on 9 April after the six-day-long Battle of Baghdad. This early stage of the war formally ended on 1 May when U.S. president George W. Bush declared the "end of major combat operations" in his Mission Accomplished speech, after which the Coalition Provisional Authority (CPA) was established as the first of several successive transitional governments leading up to the first Iraqi parliamentary election in January 2005. U.S. military forces later remained in Iraq until their withdrawal in 2011.

The coalition sent 160,000 troops into Iraq during the initial invasion phase, which lasted from 19 March to 1 May. About 73% or 130,000 soldiers were American, with about 45,000 British soldiers (25%), 2,000 Australian soldiers (1%), and about 200 Polish JW GROM commandos (0.1%). Thirty-six other countries were involved in its aftermath. In preparation for the invasion, 100,000 U.S. troops assembled in Kuwait by 18 February. The coalition forces also received support from the Peshmerga in Iraqi Kurdistan.

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, followed by a series of conflicts including the protracted Iraq War (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 Multi-National Force (MNF–I) led by the United States 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 (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.

The Iraqi insurgency was an insurgency that began in late 2011 after the end of the Iraq War and the withdrawal of U.S. troops from Iraq, resulting in violent conflict with the central government, as well as low-level sectarian violence among Iraq's religious groups.

The insurgency was a direct continuation of events following the U.S.-led invasion of Iraq in 2003. Sunni militant groups stepped up attacks targeting the country's majority Shia population to undermine confidence in the Shia-led government and its efforts to protect people without coalition assistance. Many Sunni factions stood against the Syrian government, which Shia groups moved to support, and numerous members of both sects also crossed the border to fight in Syria.

Ramadi (Arabic: ٱلرَّمَادِي Ar-Ramādī; IPA: [r.ra.maː.diː]; also formerly rendered as Rumadiyah or Rumadiya) is a city in central Iraq, about 110 kilometers (68 mi) west of Baghdad and 50 kilometers (31 mi) west of Fallujah. It is the capital and largest city of Al Anbar Governorate which shares borders with Syria, Jordan, and Saudi Arabia. The city extends along the Euphrates which bisects Al Anbar. Founded in 1879, it was one of the towns established during the later period of Ottoman Iraq. By 2018 it had about 223,500 residents, near all of whom Sunni Arabs from the Dulaim tribal confederation. It lies in the Sunni Triangle of western Iraq.

Ramadi occupies a highly strategic site on the Euphrates and the road west into Syria and Jordan. This has made it a hub for trade and traffic, from which the city gained significant prosperity. Its position has meant that it has been fought over several times, during the two World Wars and again during the Iraq War and Iraqi insurgency. It was heavily damaged during the Iraq War, when it was a major focus for the insurgency against occupying United States forces. Following the withdrawal of US forces from Iraq in 2011, the city was contested by the Iraqi government and the extremist group Islamic State of Iraq and the Levant (ISIL) and fell to ISIL in May 2015. On 28 December 2015, the Iraqi government declared, confirming media testimonies, that it had re-taken Ramadi, that government's first major military victory since its loss.