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 United States-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 the withdrawal in 2011.
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.
The following is a timeline of major events during the Iraq War, following the 2003 invasion of Iraq.
The First Battle of Fallujah, code-named Operation Vigilant Resolve, was an operation against militants in Fallujah as well as an attempt to apprehend or kill the perpetrators of the killing of four U.S. contractors in March 2004.
An Iraqi insurgency began shortly after the 2003 American invasion deposed longtime leader Saddam Hussein. It is considered to have lasted until the end of the Iraq War and U.S. withdrawal in 2011. It was followed by a renewed insurgency.
After the 2003 invasion of Iraq was completed and the regime of Saddam Hussein was toppled in May 2003, an Iraqi insurgency began that would last until the United States left in 2011. The 2003–2006 phase of the Iraqi insurgency lasted until early 2006, when it escalated from an insurgency to a Sunni-Shia civil war, which became the most violent phase of the Iraq War.
The Iraqi civil war was an 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.
Al-Askari Shrine, the 'Askariyya Shrine, or Al-Askari Mosque is a Shia Muslim mosque and mausoleum in the Iraqi city of Samarra 125 km (78 mi) from Baghdad. It is one of the most important Shia shrines in the world. It was built in 944. The dome was destroyed in a bombing by Sunni extremists in February 2006 and its two remaining minarets were destroyed in another bombing in June 2007, causing widespread anger among Shias and instigation of the Iraqi Civil War between the country's Shia and Sunni factions. The remaining clock tower was also destroyed in July 2007. The dome and minarets were repaired and the mosque reopened in April 2009.
At approximately 6:44 a.m. Arabia Standard Time on 22 February 2006, al-Askari Shrine in Samarra, Iraq, was severely damaged in a bombing attack amidst the then-ongoing Iraq War. Constructed in the 10th century, it is one of the holiest sites in Shia Islam. Despite the magnitude of the explosions, there were no casualties. American president George W. Bush asserted that the bombing had been carried out by Al-Qaeda in Iraq, which denied involvement in the attack.
The Iraqi Armed Forces are the military forces of the Republic of Iraq. They consist of the Ground forces, the Army Aviation Command, the Iraqi Air Force, the Air Defence Command and the Iraqi Navy. The armed forces are administered by the Ministry of Defence (MoD). Effective control of the MOD armed forces rests with the Prime Minister of Iraq. Along with these primary service branches, there exists the Iraqi Counter Terrorism Service and the non-MOD paramilitary Popular Mobilization Forces.
The Iraq War, sometimes called the Second Gulf War, was a protracted armed conflict in Iraq from 2003 to 2011. It began with the invasion of Iraq by the United States-led coalition that overthrew the Ba'athist government of Saddam Hussein. The conflict continued for much of the next decade as an insurgency emerged to oppose the coalition forces and the post-invasion Iraqi government. US troops were officially withdrawn in 2011.
Operation Together Forward, also known as Forward Together, was an unsuccessful offensive against sectarian militias in Baghdad to significantly reduce the violence in which had seen a sharp uprise since the mid-February 2006 bombing of the Askariya Mosque, a major Shiite Muslim shrine, in Samarra.
The 2004 Iraq spring fighting was a series of operational offensives and various major engagements during the Iraq War. It was a turning point in the war; the Spring Fighting marked the entrance into the conflict of militias and religiously based militant Iraqi groups, such as the Shi'a Mahdi Army.
The tactics of the Iraqi insurgency have varied widely. Insurgents have targeted U.S. forces and Iraqi government forces using improvised explosive devices, ambushes, snipers, and mortar and rocket fire, in addition to using car bombs, kidnappings or hostage-taking, and assassinations.
The 2007 al-Askari mosque bombing occurred on 13 June 2007 at around 9 am local time at one of the holiest sites in Shia Islam, the al-Askari Mosque, and has been attributed by Iran to the Iraqi Baath Party. While there were no injuries or deaths reported, the mosque's two ten-story minarets were destroyed in the attacks. This was the second bombing of the mosque, with the first bombing occurring on 22 February 2006 and destroying the mosque's golden dome.
Operation Phantom Thunder began on 16 June 2007, when Multi-National Force-Iraq launched major offensive operations against al-Qaeda and other extremist terrorists operating throughout Iraq. It was the largest coordinated military operation since the 2003 invasion of Iraq. Operation Phantom Thunder was a corps level operation, including Operation Arrowhead Ripper in Diyala Province, Operation Marne Torch and Operation Commando Eagle in Babil Province, Operation Fardh al-Qanoon in Baghdad, Operation Alljah in Anbar Province, and continuing special forces actions against the Mahdi Army in southern Iraq and against Al-Qaeda leadership throughout the country. The operation was one of the biggest military operations in Iraq since the U.S. invasion in 2003.
Operation Marne Torch refers to two operations launched by U.S.-led Coalition forces in 2007 against Islamic State of Iraq in the Arab Jabour area of Babil province. This campaign is named after Operation Torch, the joint US/British invasion of French North Africa in 1942, presumably because of the two operations' similar thrust into the enemies' southern underbellies.
The First Battle of Tikrit was fought for the Iraqi city of Tikrit following the city's capture by the Islamic State and Ba'athist Loyalists during the 2014 Northern Iraq offensive. The battle took place between 26 and 30 June 2014.
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, the most recent of which is the ISIS conflict, in which the Iraqi government declared victory in 2017.
US-led coalition,
New Iraqi Army 
