Expanded History
History of Iraq
From antiquity to the modern era — the historical eras, key events, and narrative that shaped Iraq.
Overview
Historical Eras
The major periods of {country}’s history at a glance.
Ancient Mesopotamia
3500 BCE – 633
The cradle of civilization, ancient Mesopotamia gave rise to Sumer, Babylon, and Assyria along the Tigris and Euphrates rivers. Innovations in writing, law, and agriculture flourished under rulers such as Hammurabi, Cyrus, and Darius. The region later passed through Achaemenid, Seleucid, Parthian, and Sasanian rule before the Arab-Muslim conquest.
Islamic Caliphates
633 – 1258
Arab Muslim forces conquered Iraq in 633, and the region became central to the early Islamic world. The Abbasid Caliphate, founded in 750 and centered in Baghdad, presided over a golden age of science, philosophy, and commerce. Internal strife, Shia revolts, and the Buyid invasion of 945 gradually weakened Abbasid authority before the Mongols sacked Baghdad in 1258.
Mongol & Timurid Era
1258 – 1534
The Mongol destruction of Baghdad in 1258 ended the Abbasid Caliphate and devastated Iraq's irrigation infrastructure, triggering prolonged economic and demographic decline. The region fragmented under successive Ilkhanid, Jalayirid, and Timurid overlords, with Timur's campaigns further devastating the population in the late fourteenth century. Tribal autonomy filled the vacuum left by collapsed central authority.
Ottoman Iraq
1534 – 1917
Ottoman Sultan Suleiman the Magnificent conquered Iraq in 1533–1534, incorporating it as a contested frontier zone repeatedly fought over with Safavid Persia. Governed through the vilayets of Mosul, Baghdad, and Basra, the region endured weak central control, persistent tribal autonomy, and economic stagnation for much of this period. Late nineteenth-century Tanzimat reforms and the opening of the Suez Canal brought modest modernization and renewed strategic importance.
British Mandate
1917 – 1932
British forces occupied Baghdad in 1917 during World War I, and the 1920 San Remo Conference formalized the League of Nations Mandate over Iraq. A major nationalist uprising in 1920 compelled Britain to install the Hashemite King Faisal I in 1921, creating a constitutional monarchy under continued British oversight. Iraq gained formal independence and League of Nations membership in 1932, though British influence and military presence persisted.
Monarchy to Republic
1932 – 1968
The Hashemite monarchy navigated coups, pan-Arab nationalism, and the turbulent aftermath of World War II before being overthrown in the 1958 revolution that killed King Faisal II and established the Republic of Iraq. A succession of military governments followed, marked by instability, Kurdish insurgency, and contests between Nasserist, communist, and Baathist factions. The Baath Party briefly held power in 1963 before being ousted, setting the stage for its definitive return.
Baath & Modern Iraq
1968 – present
The Baath Party seized power in 1968, and Saddam Hussein consolidated authoritarian rule by 1979, leading Iraq into the devastating Iran-Iraq War (1980–1988) and the Gulf War triggered by the 1990 invasion of Kuwait. The U.S.-led invasion of 2003 toppled Saddam Hussein, disbanding the Baathist state and unleashing prolonged sectarian conflict, the rise and fall of the Islamic State, and an ongoing struggle to build stable democratic governance.
Timeline Preview
The first 7 key events. View the full chronology on the timeline page.
3500 BCE
Known as Mesopotamia a region now in southeastern Iraq.
Known as Mesopotamia, the world’s first civilization developed in Sumer, a region now in southeastern Iraq.
627
Byzantine invasion, and the region was weakened politically and economically.
Byzantine invasion, and the region was weakened politically and economically.
633
Muslims conquered Syria and Iraq.
Muslims conquered Syria and Iraq.
680
Tragedy of Karbala
Tragedy of Karbala (in modern Iraq): Troops from Umayyad caliph Yazid I (645 - 683) murdered Husayn (c. 626 - 680) who, for the Shiites, was really the legitimate successor to the caliphate. This triggered the Shi’i’tes’ open and violent revolt against Umayyad rule, with the anniversary of Husayn’s death becoming a Shi’ite day of mourning.
685 – 687
Shi’i’te Muslims staged a revolt in Iraq.
Shi’i’te Muslims staged a revolt in Iraq.
747
Revolt by the Iraqi family Abbasi starts.
Revolt by the Iraqi family Abbasi starts.
750
The Abbasids assumed command of the Islamic world
The Abbasids assumed command of the Islamic world (except Spain, which fell under the control of a descendant of the Umayyad family) and moved the capital to Baghdad in Iraq.

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