Historyedit

Prehistoric and ancient Mesopotamiaedit

Between 65,000 BC and 35,000 BC, northern Iraq was home to a Neanderthal culture, archaeological remains of which have been discovered at Shanidar Cave This region is also the location of a number of pre-Neolithic burials, dating from approximately 11,000 BC. Since approximately 10,000 BC, Iraq, together with a large part of the Fertile Crescent, was a centre of a Neolithic culture known as Pre-Pottery Neolithic A (PPNA), where agriculture and cattle breeding appeared for the first time. In Iraq, this period has been excavated at sites like M'lefaat and Nemrik 9. The following Neolithic period, PPNB, is represented by rectangular houses.

At the time of the pre-pottery Neolithic, people used vessels made of stone, gypsum and burnt lime (Vaisselle blanche). Finds of obsidian tools from Anatolia are evidences of early trade relations. Further important sites of human advancement were Jarmo (circa 7100 BC), a number of sites belonging to the Halaf culture, and Tell al-'Ubaid, the type site of the Ubaid period (between 6500 BC and 3800 BC). The respective periods show ever-increasing levels of advancement in agriculture, tool-making and architecture.

The "Cradle of Civilisation" is a common term for the area comprising modern Iraq as it was home to the earliest known civilisation, the Sumerian civilisation, which arose in the fertile Tigris-Euphrates river valley of southern Iraq in the Chalcolithic (Ubaid period). It was there, in the late 4th millennium BC, that the world's first known writing system emerged. The Sumerians were also the first known to harness the wheel and create city states; their writings record the first known evidence of mathematics, astronomy, astrology, written law, medicine and organised religion. The Sumerian language is a language isolate. The major city states of the early Sumerian period were Eridu, Bad-tibira, Larsa, Sippar, Shuruppak, Uruk, Kish, Ur, Nippur, Lagash, Girsu, Umma, Hamazi, Adab, Mari, Isin, Kutha, Der and Akshak. The cities to the north like Ashur, Arbela (modern Erbil) and Arrapha (modern Kirkuk) were also extant in what was to be called Assyria from the 25th century BC; however, at this stage, they were Sumerian-ruled administrative centres.

During the Bronze Age, in the 26th century BC, Eannatum of Lagash created a short-lived empire. Later, Lugal-Zage-Si, the priest-king of Umma, overthrew the primacy of the Lagash dynasty in the area, then conquered Uruk, making it his capital, and claimed an empire extending from the Persian Gulf to the Mediterranean. It was during this period that the Epic of Gilgamesh originates, which includes the tale of The Great Flood. The origin and location of Akkad remain unclear. Its people spoke Akkadian, an East Semitic language. Between the 29th and 24th centuries BC, a number of kingdoms and city states within Iraq began to have Akkadian speaking dynasties, including Assyria, Ekallatum, Isin and Larsa.

However, the Sumerians remained generally dominant until the rise of the Akkadian Empire (2335–2124 BC), based in the city of Akkad in central Iraq. Sargon of Akkad founded the empire, conquered all of the city states of southern and central Iraq, and subjugated the kings of Assyria, thus uniting the Sumerians and Akkadians in one state. The Akkadian Empire was the first ancient empire of Mesopotamia after the long-lived civilization of Sumer.

He then set about expanding his empire, conquering Gutium, Elam in modern-day Iran, and had victories that did not result into a full conquest against the Amorites and Eblaites of the Levant. The empire of Akkad likely fell in the 22nd century BC, within 180 years of its founding, ushering in a "Dark Age" with no prominent imperial authority until the Third Dynasty of Ur. The region's political structure may have reverted to the status quo ante of local governance by city-states. After the collapse of the Akkadian Empire in the late 22nd century BC, the Gutians occupied the south for a few decades, while Assyria reasserted its independence in the north. Most of southern Mesopotamia was again united under one ruler during the Ur III period, most notably during the rule of the prolific king Shulgi. His accomplishments include the completion of construction of the Great Ziggurat of Ur, begun by his father Ur-Nammu. In 1792 BC, an Amorite ruler named Hammurabi came to power and immediately set about building Babylon into a major city, declaring himself its king. Hammurabi conquered southern and central Iraq, as well as Elam to the east and Mari to the west, then engaged in a protracted war with the Assyrian king Ishme-Dagan for domination of the region, creating the short-lived Babylonian Empire. He eventually prevailed over the successor of Ishme-Dagan and subjected Assyria and its Anatolian colonies. By the middle of the eighteenth century BC, the Sumerians had lost their cultural identity and ceased to exist as a distinct people.

It is from the period of Hammurabi that southern Iraq came to be known as Babylonia, while the north had already coalesced into Assyria hundreds of years before. However, his empire was short-lived, and rapidly collapsed after his death, with both Assyria and southern Iraq, in the form of the Sealand Dynasty, falling back into native Akkadian hands.

After this, another foreign people, the Language Isolate speaking Kassites, seized control of Babylonia. Iraq was from this point divided into three polities: Assyria in the north, Kassite Babylonia in the south central region, and the Sealand Dynasty in the far south. The Sealand Dynasty was finally conquered by Kassite Babylonia circa 1380 BC. The origin of the Kassites is uncertain.

The Middle Assyrian Empire (1365–1020 BC) saw Assyria rise to be the most powerful nation in the known world. Beginning with the campaigns of Ashur-uballit I, Assyria destroyed the rival Hurrian-Mitanni Empire, annexed huge swathes of the Hittite Empire for itself, annexed northern Babylonia from the Kassites, forced the Egyptian Empire from the region, and defeated the Elamites, Phrygians, Canaanites, Phoenicians, Cilicians, Gutians, Dilmunites and Arameans. At its height, the Middle Assyrian Empire stretched from The Caucasus to Dilmun (modern Bahrain), and from the Mediterranean coasts of Phoenicia to the Zagros Mountains of Iran. In 1235 BC, Tukulti-Ninurta I of Assyria took the throne of Babylon.

During the Bronze Age collapse (1200–900 BC), Babylonia was in a state of chaos, dominated for long periods by Assyria and Elam. The Kassites were driven from power by Assyria and Elam, allowing native south Mesopotamian kings to rule Babylonia for the first time, although often subject to Assyrian or Elamite rulers. However, these Akkadian kings were unable to prevent new waves of West Semitic migrants entering southern Iraq, and during the 11th century BC Arameans and Suteans entered Babylonia from The Levant, and these were followed in the late 10th to early 9th century BC by the Chaldeans. However, the Chaldeans were absorbed and assimilated into the indigenous population of Babylonia.

Iron Ageedit

After a period of comparative decline in Assyria, it once more began to expand with the Neo Assyrian Empire (935–605 BC). Because of its geopolitical dominance and ideology based in world domination, the Neo-Assyrian Empire is by many researchers regarded to have been the first world empire. At its height, the empire was the strongest military power in the world. and ruled over all of Mesopotamia, the Levant and Egypt, as well as portions of Anatolia, Arabia and modern-day Iran and Armenia. Under rulers such as Adad-Nirari II, Ashurnasirpal, Shalmaneser III, Semiramis, Tiglath-pileser III, Sargon II, Sennacherib, Esarhaddon and Ashurbanipal, Iraq became the centre of an empire stretching from Persia, Parthia and Elam in the east, to Cyprus and Antioch in the west, and from The Caucasus in the north to Egypt, Nubia and Arabia in the south.

It was during this period that an Akkadian-influenced form of Eastern Aramaic was adopted by the Assyrians as their lingua franca, and Mesopotamian Aramaic began to supplant Akkadian as the spoken language of the general populace of both Assyria and Babylonia. The descendant dialects of this tongue survive amongst the Mandaeans of southern Iraq and Assyrians of northern Iraq. The Arabs and the Chaldeans are first mentioned in written history (circa 850 BC) in the annals of Shalmaneser III.

The Neo-Assyrian Empire left a legacy of great cultural significance. The political structures established by the Neo-Assyrian Empire became the model for the later empires that succeeded it and the ideology of universal rule promulgated by the Neo-Assyrian kings inspired similar ideas of rights to world domination in later empires. The Neo-Assyrian Empire became an important part of later folklore and literary traditions in northern Mesopotamia. Judaism, and thus in turn also Christianity and Islam, was profoundly affected by the period of Neo-Assyrian rule; numerous Biblical stories appear to draw on earlier Assyrian mythology and history and the Assyrian impact on early Jewish theology was immense. Although the Neo-Assyrian Empire is prominently remembered today for the supposed excessive brutality of the Neo-Assyrian army, the Assyrians were not excessively brutal when compared to other civilizations. In the late 7th century BC, the Assyrian Empire tore itself apart with a series of brutal civil wars, weakening itself to such a degree that a coalition of its former subjects, the Babylonians, Chaldeans, Medes, Persians, Parthians, Scythians and Cimmerians, were able to attack Assyria, finally bringing its empire down by 605 BC.

The short-lived Neo-Babylonian Empire (620–539 BC) succeeded that of Assyria. It failed to attain the size, power or longevity of its predecessor; however, it came to dominate The Levant, Canaan, Arabia, Israel and Judah, and to defeat Egypt. Initially, Babylon was ruled by the Chaldeans, who had migrated to the region in the late 10th or early 9th century BC. Its greatest king, Nebuchadnezzar II, rivalled Hammurabi as the greatest king of Babylon. However, by 556 BC, the Chaldeans had been deposed by the Assyrian-born Nabonidus and his son and regent Belshazzar.

The transfer of empire to Babylon marked the first time the city, and southern Mesopotamia in general, had risen to dominate the Ancient Near East since the collapse of Hammurabi's Old Babylonian Empire. The period of Neo-Babylonian rule saw unprecedented economic and population growth and a renaissance of culture and artwork. Nebuchadnezzar II succeeded Nabopolassar in 605 BC. The empire Nebuchadnezzar inherited was among the most powerful in the world, in which he quickly reinforced his father's alliance with the Medes by marrying Cyaxares's daughter or granddaughter, Amytis. Some sources suggest that the famous Hanging Gardens of Babylon, one of the Seven Wonders of the Ancient World, were built by Nebuchadnezzar for his wife (though the existence of these gardens is debated). Nebuchadnezzar's 43-year reign would bring with it a golden age for Babylon, which was to become the most powerful kingdom in the Middle East. In the 6th century BC, Cyrus the Great of neighbouring Persia defeated the Neo-Babylonian Empire at the Battle of Opis and Mesopotamia was subsumed into the Achaemenid Empire. The Achaemenids made Babylon their main capital. The Chaldeans disappeared at around this time, though both Assyria and Babylonia endured and thrived under Achaemenid rule (see Achaemenid Assyria). Their kings retained Assyrian Imperial Aramaic as the language of empire, together with the Assyrian imperial infrastructure, and an Assyrian style of art and architecture.

In the late 4th century BC, Alexander the Great conquered the region, putting it under Hellenistic Seleucid rule for over two centuries. The Parthians (247 BC – 224 AD) from Persia conquered the region during the reign of Mithridates I of Parthia (r. 171–138 BC). From northwestern Mesopotamia, the Romans invaded western parts of the region several times, and for over four centuries they ruled part of it, that were incorporated into the Mesopotamia province, until it was conquered by the Muslims in the 7th century. For a short period they also ruled Assyria, which was incorporated into the Assyria Provincia.

Christianity began to take hold in Iraq (particularly in Assyria) between the 1st and 3rd centuries, and Assyria became a centre of Syriac Christianity, the Church of the East and Syriac literature. A number of independent states evolved in the north during the Parthian era, such as Adiabene, Assur, Osroene and Hatra. The Sassanids of Persia under Ardashir I destroyed the Parthian Empire and conquered the region in 224 AD. During the 240s and 250s AD, the Sassanids gradually conquered the independent states, culminating with Assur in 256 AD. The region became the frontier and battleground between the Sassanid Empire and Byzantine Empire.

Middle Agesedit

The first organised conflict between invading Arab-Muslim forces and occupying Sassanid domains in Mesopotamia seems to have been in 634, when the Arabs were defeated at the Battle of the Bridge. This was followed by Khalid ibn al-Walid's successful campaign which saw all of Iraq come under Arab rule within a year, with the exception of the Sassanid Empire's capital, Ctesiphon. By the end of 638, the Muslims had conquered all of the Western Sassanid provinces (including modern Iraq), and the last Sassanid Emperor, Yazdegerd III, had fled to central and then northern Persia, where he was killed in 651.

The Islamic expansions constituted the largest of the Semitic expansions in history. These new arrivals established two new garrison cities, at Kufa, near ancient Babylon, and at Basra in the south and established Islam in these cities, while the north remained largely Assyrian and Christian in character. The Abbasid Caliphate built the city of Baghdad along the Tigris in the 8th century as its capital, and the city became the leading metropolis of the Arab and Muslim world. Baghdad was the largest multicultural city of the Middle Ages, peaking at a population of more than a million, and was the centre of learning during the Islamic Golden Age. The Mongols destroyed the city and burned its library during the siege of Baghdad in the 13th century. In 1257, Hulagu Khan besieged Baghdad, sacked the city and massacred many of the inhabitants. Estimates of the number of dead range from 200,000 to a million.

The Mongols destroyed the Abbasid Caliphate and Baghdad's House of Wisdom. The city has never regained its previous pre-eminence as a major centre of culture and influence. Some historians believe that the Mongol invasion destroyed much of the irrigation infrastructure that had sustained Mesopotamia for millennia. Other historians point to soil salination as the culprit in the decline in agriculture.

The mid-14th-century Black Death ravaged much of the Islamic world. The best estimate for the Middle East is a death rate of roughly one-third. In 1401, a warlord of Mongol descent, Tamerlane (Timur Lenk), invaded Iraq. After the capture of Baghdad, 20,000 of its citizens were massacred. Timur also conducted massacres of the indigenous Assyrian Christian population, hitherto still the majority population in northern Mesopotamia, and it was during this time that the ancient Assyrian city of Assur was finally abandoned.

Portuguese and Ottoman Iraqedit

During the late 14th and early 15th centuries, the Black Sheep Turkmen ruled the area now known as Iraq. In 1466, the White Sheep Turkmen took control. From 1508, as with all territories of the former White Sheep Turkmen, Iraq fell into the hands of the Iranian Safavids. With the Treaty of Zuhab in 1639, most of the territory of present-day Iraq came under the control of Ottoman Empire as the eyalet of Baghdad as a result of wars with the neighbouring rival, Safavid Iran. Throughout most of the period of Ottoman rule (1533–1918), the territory of present-day Iraq was a battle zone between the rival regional empires and tribal alliances.

In 1523, the Portuguese commanded by António Tenreiro crossed from Aleppo to Basra trying to make alliances with local lords in the name of the Portuguese king. In 1550, the local kingdom of Basra and tribal rulers relied on the Portuguese against the Ottomans, after which the Portuguese threatened several times to invoke an invasion and conquest of Basra. From 1595, the Portuguese acted as military protectors of Basra, and in 1624 they helped the Ottoman pasha of Basra to repel a Persian invasion. The Portuguese were granted a share of customs revenue and exemption from tolls. From approximately 1625 to 1668, Basra and the Delta marshes were in the hands of local chiefs independent of the Ottoman administration in Baghdad. In the 17th century, the frequent conflicts with the Safavids had sapped the strength of the Ottoman Empire and had weakened its control over its provinces. The nomadic population swelled with the influx of bedouins from Najd. Bedouin raids on settled areas became impossible to curb.

During the years 1747–1831, Iraq was ruled by a Mamluk dynasty of Georgian origin who succeeded in obtaining autonomy from the Ottoman Porte, suppressed tribal revolts, curbed the power of the Janissaries, restored order and introduced a programme of modernisation of economy and military. In 1802, Wahhabis from Najd attacked Karbala in Iraq, killing up to 5,000 people and plundering the Imam Husayn Shrine. In 1831, the Ottomans managed to overthrow the Mamluk regime and imposed their direct control over Iraq. The population of Iraq, estimated at 30 million in 800 AD, was only 5 million at the start of the 20th century.

During World War I, the Ottomans sided with Germany and the Central Powers. In the Mesopotamian campaign against the Central Powers, British forces invaded the country and initially suffered a major defeat at the hands of the Turkish army during the Siege of Kut (1915–1916). However, the British began to gain the upper hand, and were further aided by the support of local Arabs and Assyrians. In 1916, the British and French made a plan for the post-war division of West Asia under the Sykes-Picot Agreement. British forces regrouped and captured Baghdad in 1917, and defeated the Ottomans. An armistice was signed in 1918.

Mandate of Mesopotamia and independent kingdomedit

During the Ottoman Empire until the partition of the Ottoman Empire in the 20th century, Iraq was made up of three provinces, called vilayets in the Ottoman language: Mosul Vilayet, Baghdad Vilayet, and Basra Vilayet. These three provinces were joined into one kingdom by the British after the region became a League of Nations mandate, administered under British control, with the name "State of Iraq". A fourth province (Zor Sanjak), which Iraqi nationalists considered part of Upper Mesopotamia was ultimately added to Syria. In line with their "Sharifian Solution" policy, the British established the Hashemite king on 23 August 1921, Faisal I of Iraq, who had been forced out of Syria by the French, as their client ruler. The official English name of the country simultaneously changed from Mesopotamia to the endonymic Iraq. Likewise, British authorities selected Sunni Arab elites from the region for appointments to government and ministry offices.

Faced with spiralling costs and influenced by the public protestations of the war hero T. E. Lawrence, Britain replaced Arnold Wilson in October 1920 with a new Civil Commissioner, Sir Percy Cox. Cox managed to quell a rebellion, yet was also responsible for implementing the fateful policy of close co-operation with Iraq's Sunni minority. Slavery was abolished in the 1920s. Britain granted independence to the Kingdom of Iraq in 1932, on the urging of King Faisal, though the British retained military bases and local militia in the form of Assyrian Levies. King Ghazi ruled as a figurehead after King Faisal's death in 1933, while undermined by attempted military coups, until his death in 1939. Ghazi was followed by his underage son, Faisal II, with 'Abd al-Ilah as Regent. On 1 April 1941, Rashid Ali al-Gaylani and members of the Golden Square staged a coup d'état. During the subsequent Anglo-Iraqi War, the United Kingdom invaded Iraq for fear that the government might cut oil supplies to Western nations because of his links to the Axis powers.

The war started on 2 May, and the British, together with loyal Assyrian Levies, defeated the forces of Al-Gaylani, forcing an armistice on 31 May. Nuri Said served as the prime minister during the Kingdom of Iraq. In 1930, during his first term, he signed the Anglo-Iraqi Treaty, which, as a step toward greater independence, granted Britain the unlimited right to station its armed forces in and transit military units through Iraq and also gave legitimacy to British control of the country's oil industry. In addition, Said contributed to the establishment of the Kingdom of Iraq and the Iraqi army. A military occupation followed the restoration of the pre-coup government of the Hashemite monarchy. The occupation ended on 26 October 1947, although Britain was to retain military bases in Iraq until 1954, after which the Assyrian militias were disbanded. The rulers during the occupation and the remainder of the Hashemite monarchy were Nuri as-Said, the autocratic Prime Minister, who also ruled from 1930 to 1932, and 'Abd al-Ilah, the former Regent who now served as an adviser to King Faisal II.

Iraqi Republicedit

In 1958, a coup d'état known as the 14 July Revolution was led by the Brigadier General and nationalist Abd al-Karim Qasim. This revolt was strongly anti-imperial and anti-monarchical in nature and had strong socialist elements. Numerous people were killed in the coup, including King Faysal II, Prince Abd al-Ilah, and Nuri al-Sa'id, which is known as "the Royal family massacre". Even after burial their bodies were dragged through the streets of Baghdad and mutilated. Following his rise to power, many people demonstrated in support for Qasim.

Qasim controlled Iraq through military rule and in 1958 he began a process of forcibly reducing surplus land owned by a few citizens and having the state redistribute the land. Iraq state emblem under nationalist Qasim was mostly based on Mesopotamian symbol of Shamash, and avoided pan-Arab symbolism by incorporating elements of Socialist heraldry. In 1959, Colonel Abd al-Wahab al-Shawaf led an uprising in Mosul to overthrew Qassim and aimed to join the United Arab Republic, but was repressed by the government. Iraq withdrew from the Baghdad Pact in 1959 leading to strained relations with the West.

In 1961, Kurdish nationalist movements, led by Mustafa Barzani's the Kurdistan Democratic Party, launch an armed rebellion against the Iraqi government, seeking autonomy for the Kurdish region. The government faces challenges in quelling the Kurdish uprising, leading to intermittent clashes between Kurdish forces and the Iraqi military. Iraq also sided with the Arab coalition in support for the Palestinian cause in the Six Day War of 1967 against Israel. Qassim was killed and overthrown by Colonel Abdul Salam Arif in a February 1963 coup.

The Ba'ath Party assumes power, but internal divisions within the party lead to political instability and a series of unsuccessful coups. Same year, a revolt began at Ar-Rashid army camp in Baghdad, which was again crushed by government just like the 1959 uprisings. After the Abdul Salam Arif's death in airplane accident in 1966, he was succeeded by his brother, Abdul Rahman Arif. He was overthrown in a coup by the Ba'ath Party on 17 July 1968.

Ba'athist Iraqedit

Overthrew of Abdul Rahman Arif and paved a way for establishment of Ba'athist Iraq, headed by Ahmed Hassan al-Bakr as president. The new government of Iraq was based on Ba'athist ideology, founded by Michel Aflaq, advocating Arab nationalism and Arab socialism. Ba'athist period of Iraq began with a high-level of prosperity and reforms, which turned Iraq into a powerful and leading country in the Middle East. During this period the country transitioned from having one of the highest illiteracy and income inequalities to establishing impressive social development reforms.

Al-Bakr served as first Ba'ath president of Iraq. But then the movement gradually came under the control of Saddam Hussein, who acceded to the presidency and control of the Revolutionary Command Council (RCC), then Iraq's supreme executive body, in July 1979. Despite presidency of Al-Bakr, Saddam is credited mostly for his role in turning Iraq into a prosperous and powerful country. In 1970, an agreement was signed between Saddam and Kurdish leader Mustafa Barzani, to grant autonomy for Kurds. However, failure of the agreement led to a war between Kurds and the Ba'ath party. The result of the war was victory for the Iraqi government and defeat of the Kurdish rebels.

Following months of cross-border raids with Iran, Saddam declared war on Iran in September 1980, initiating the Iran–Iraq War (or First Persian Gulf War). Taking advantage of the post-Iranian Revolution chaos in Iran, Iraq captured some territories in southwest Iran, but Iran recaptured all of the lost territories within two years, and for the next six years Iran was on the offensive. The war, which ended in stalemate in 1988, killed between half a million and 1.5 million people. During the war, Saddam Hussein extensively used chemical weapons against Iranians. In the final stages of the Iran–Iraq War, the Ba'athist Iraqi regime led the Al-Anfal Campaign, a genocidal campaign that targeted Iraqi Kurds, and led to the killing of 50,000–100,000 civilians. In 1981, Israel attacked and destroyed a nuclear reactor.

Due to Iraq's inability to pay Kuwait more than US$14 billion that it had borrowed to finance the Iran–Iraq War and Kuwait's surge in petroleum production levels which kept revenues down, Iraq interpreted Kuwait's refusal to decrease its oil production as an act of aggression. In August 1990 Iraq invaded and annexed Kuwait. This led to military intervention by United States-led coaltion forces in the First Gulf War. The coalition forces proceeded with a bombing campaign targeting military targets and then launched a 100-hour-long ground assault against Iraqi forces in Southern Iraq and Kuwait. Iraq also launched attacks on Saudi Arabia and Israel, by scud missiles. Iraq's armed forces were devastated during the war. The war resulted in the expulsion of many peoples from Kuwait.

Shortly after it ended in 1991, Kurdish Iraqis led several uprisings against Saddam Hussein's regime, but these were repressed. It is estimated that as many as 100,000 people, including many civilians were killed. During the uprisings the US, UK, France and Turkey, claiming authority under UNSCR 688, established the Iraqi no-fly zones to protect Kurdish population from attacks.

Iraq was ordered to destroy its chemical and biological weapons and the UN attempted to compel Saddam's government to disarm and agree to a ceasefire by imposing additional sanctions on the country in addition to the initial sanctions imposed following Iraq's invasion of Kuwait. The Iraqi Government's failure to disarm and agree to a ceasefire resulted in sanctions which remained in place until 2003. The effects of the sanctions on the civilian population of Iraq have been disputed. Whereas it was widely believed that the sanctions caused a major rise in child mortality, recent research has shown that commonly cited data were fabricated and that "there was no major rise in child mortality in Iraq". An oil for food program was established in 1996 to ease the effects of sanctions.

Iraq Waredit

Following the September 11 attacks, the George W. Bush administration began planning the overthrow of Saddam's government. In October 2002, the US Congress passed the Joint Resolution to authorize the use of U.S. Armed Forces against Iraq. In November 2002, the UN Security Council passed UNSCR 1441 and in March 2003 the United States and its allies invaded Iraq. On 20 March 2003, a US-organised coalition invaded Iraq, under the pretext that Iraq had failed to abandon its weapons of mass destruction program. Following the invasion, the United States established the Coalition Provisional Authority to govern Iraq. In May 2003 L. Paul Bremer, the chief executive of the CPA, issued orders to exclude Ba'ath Party members from the new Iraqi government (CPA Order 1) and to disband the Iraqi Army (CPA Order 2). The decision dissolved the largely Sunni Iraqi Army and excluded many of the country's former government officials, including 40,000 school teachers who had joined the Ba'ath Party simply to keep their jobs, helping to bring about a chaotic post-invasion environment.

An insurgency against the US-led coalition-rule of Iraq began in summer 2003 within elements of the former Iraqi secret police and army, who formed guerrilla units. In fall 2003, 'jihadist' groups began targeting coalition forces. Various Sunni militias were created in 2003, for example Jama'at al-Tawhid wal-Jihad led by Abu Musab al-Zarqawi. The insurgency included intense inter-ethnic violence between Sunnis and Shias. The Abu Ghraib torture and prisoner abuse scandal came to light in late 2003. Saddam was captured by the U.S. forces in December 2003 and was interrogated at Baghdad Airport. The Mahdi Army—a Shia militia created in the summer of 2003 by Muqtada al-Sadr—began to fight Coalition forces in April 2004.

2004 saw Sunni and Shia militants fighting against each other and against the new Iraqi Interim Government installed in June 2004, and against Coalition forces, as well as the First Battle of Fallujah in April and Second Battle of Fallujah in November. The Mahdi army would kidnap Sunni civilians as part of a genocide. In January 2005, the first elections since the invasion took place and in October a new Constitution was approved, which was followed by parliamentary elections in December. However, insurgent attacks increased to 34,131 in 2005 from 26,496 in 2004. During 2006, fighting continued and reached its highest levels of violence, more war crimes scandals such as Hadhita massacre were made public. Abu Musab al-Zarqawi the leader of Al-Qaeda in Iraq was killed by US forces and Iraq's former dictator and deposed president Saddam Hussein was hanged for crimes against humanity – his involvement in the 1982 massacre. The civil war was fought from 2006 to 2008.

In late 2006, the US government's Iraq Study Group recommended that the US begin focusing on training Iraqi military personnel and in January 2007 George W. Bush announced a "Surge" in the number of US troops deployed to the country. In May 2007, Iraq's Parliament called on the United States to set a timetable for withdrawal and US coalition partners such as the U.K and Denmark began withdrawing their forces. In 2008, fighting continued and Iraq's newly trained armed forces launched attacks against militants. The Iraqi government signed the US–Iraq Status of Forces Agreement, which required US forces to withdraw from Iraqi cities by 30 June 2009 and to withdraw completely from Iraq by 31 December 2011. US troops handed over security duties to Iraqi forces in June 2009, though they continued to work with Iraqi forces after the pullout. On the morning of 18 December 2011, the final contingent of US troops to be withdrawn ceremonially exited over the border to Kuwait. Crime and violence initially spiked in the months following the US withdrawal from cities in mid-2009 but despite the initial increase in violence, in November 2009, Iraqi Interior Ministry officials reported that the civilian death toll in Iraq fell to its lowest level since the 2003 invasion.

Following the withdrawal of US troops in 2011, the insurgency continued and Iraq suffered from political instability. Claim of possessing weapons of mass destruction was based on documents provided by the CIA and the British government that were later found to be unreliable and allegation on Saddam Hussein having links with Al Qaeda during the September 11 attacks came out be a false. Future political instability and insurgency remained as an effect of the war. This increased positive legacy of Saddam Hussein. According to a survey, 67% of Iraqis viewed the government of Saddam Hussein better than current one. It has been argued though that the U.S. actually were pursuing national objectives to expand their spheres of power. The war in Iraq has resulted in between 151,000 and 1.2 million Iraqis being killed.

Post-war conflict and insurgencyedit

Sectarian violence continued in the first half of 2013 with at least 56 people killed in April when a Sunni protest in Hawija was interrupted by a government-supported helicopter raid. On 20 May 2013, at least 95 people died in a wave of car bomb attacks that was preceded by a car bombing on 15 May that led to 33 deaths; also, on 18 May, 76 people were killed in the Sunni areas of Baghdad. On 22 July 2013, at least five hundred convicts, most of whom were senior members of al-Qaida who had received death sentences, broke out of Iraq's Abu Ghraib Jail when comrades launched a military-style assault to free them. The attack began when a suicide bomber drove a car packed with explosives into prison gates. James F. Jeffrey, the United States ambassador in Baghdad when the last American troops exited, said the assault and resulting escape "will provide seasoned leadership and a morale boost to Al Qaeda and its allies in both Iraq and Syria ... it is likely to have an electrifying impact on the Sunni population in Iraq, which has been sitting on the fence."

By late June, the Iraqi government had lost control of its borders with both Jordan and Syria. al-Maliki called for a national state of emergency on 10 June following the attack on Mosul. However, despite the security crisis, Iraq's parliament did not allow Maliki to declare a state of emergency; many legislators boycotted the session because they opposed expanding the prime minister's powers. After an inconclusive election in April 2014, Nouri al-Maliki served as caretaker-Prime-Minister. On 11 August, Iraq's highest court ruled that PM Maliki's bloc was the largest in parliament, meaning Maliki could stay Prime Minister. By 13 August, however, the Iraqi president had tasked Haider al-Abadi with forming a new government, and the United Nations, the United States, the European Union, Saudi Arabia, Iran, and some Iraqi politicians expressed their wish for a new leadership in Iraq. On 14 August, Maliki stepped down as PM. On 8 September 2014, Haider al-Abadi became prime minister. Abadi promised to stamp out corruption and ease sectarian tensions. Intermittent conflict between Sunni, Shia and Kurdish factions has led to increasing debate about the splitting of Iraq into three autonomous regions: Kurdistan in the northeast, a Sunni state in the west and a Shia state in the southeast.

In response to rapid territorial gains made by the Islamic State in early 2014, and its universally-condemned executions and reported human rights abuses, many states began to intervene against it in the 2013–2017 war. ISIL began losing ground in both Iraq and Syria. Tens of thousands of civilians have been killed in Iraq in ISIL-linked violence. The genocide of Yazidis by ISIL has led to the expulsion, flight and effective exile of the Yazidis. The 2016 Karrada bombing killed nearly 400 civilians and injured hundreds more. On 17 March 2017, a US-led coalition airstrike in Mosul killed more than 200 civilians. By December 2017, ISIL had no remaining territory in Iraq, following the 2017 Western Iraq campaign.

In September 2017, a referendum was held regarding Kurdish independence in Iraq. 92% of Iraqi Kurds voted in favor of independence. The referendum was regarded as illegal by the federal government. On 9 December 2017, then-Iraqi Prime Minister Haider al-Abadi declared victory over ISIL and announced full liberation of borders with Syria from Islamic State militants. Kurdistan Regional Government have announced that it would respect the Supreme Federal Court's ruling that no Iraqi province is allowed to secede.Parliamentary elections were held on 12 May 2018. Kurdish politician, Barham Salih was elected as president by parliament in October 2018. Former Finance Minister Adil Abdul-Mahdi was selected to form a new government. The new government was approved by the Council of Representatives on 24 October 2018. Protests over deteriorating economic conditions and state corruption started in July 2018 in Baghdad and other major Iraqi cities, mainly in the central and southern provinces. The latest nationwide protests, erupting in October 2019, had a death toll of at least 93 people, including police. On 3 January 2020, a U.S. drone strike killed Qasem Soleimani, leader of Iran's Quds Force, and Abu Mahdi al-Muhandis, deputy commander of the Popular Mobilization Forces, as their convoy left Baghdad International Airport.

In November 2021, Iraqi Prime Minister Mustafa al-Kadhimi survived a failed assassination attempt. Cleric Muqtada al-Sadr's Sadrist Movement was the biggest winner in the 2021 parliamentary elections. Governmental stalemate lead to the 2022 Iraqi political crisis. In October 2022, Abdul Latif Rashid was elected as the new President of Iraq after winning the parliamentary election against incumbent Barham Salih, who was running for a second term. The presidency is largely ceremonial and is traditionally held by a Kurd. On 27 October 2022, Mohammed Shia al-Sudani, close ally of former Prime Minister Nouri al-Maliki, took the office to succeed Mustafa al-Kadhimi as new Prime Minister of Iraq, the most powerful post in the country.

The country's electrical grid faces systemic pressures due to climate change, fuel shortages, and an increase in demand. Corruption remains endemic throughout all levels of Iraqi governance while the US-endorsed sectarian political system has driven increased levels of violent terrorism and sectarian conflicts within the country. Climate change is driving wide-scale droughts across the country while water reserves are rapidly depleting. The country has been in a prolonged drought since 2020 and experienced its second-driest season in the past four decades in 2021. Water flows in the Tigris and Euphrates are down between 30 and 40%. Half of the country's farmland is at risk of desertification. Nearly 40% of Iraq "has been overtaken by blowing desert sands that claim tens of thousands of acres of arable land every year".