- Ubaid period (6500 - 3800 BC)
- Sumer (4500 - 1900 BC)
- Uruk period (4000 - 3100 BC)
- Assyria (2500 - 609 BC)
- Akkadian Empire (2334 - 2154 BC)
- Babylonia (1895 - 539 BC)
- Neo-Assyrian Empire (911 - 609 BC)
- Neo-Babylonian Empire (626 - 539 BC)
- Achaemenid Empire (550 - 330 BC)
- Seleucid Empire (312 - 63 BC)
- Sasanian Empire (224 - 651 AD)
- Rashidun Caliphate (632 - 661 AD)
- Battle of al-Qadishiyyah (636 AD)
- Abbasid Caliphate (750 - 1517 AD)
- Mongol invasion (1258)
- Jalayirid Sultanate (1335-1435)
- Qara Qoyunlu (1374-1468)
- Ottoman Empire occupation of Iraq (1533-1918)
- Siege of Kut (1915-1916)
- Iraqi Revolt of 1920
- Britain occupies Iraq (1921-1932)
- Anglo-Iraqi Treaty of 1922
- Kingdom of Iraq (1932-1958)
- Military coup d'état (1936)
- Nationalist coup d'état (1941)
- Founding Member of the Arab League (1945)
- Arab-Israeli War (1948)
- July 14th Revolution (1958)
- Iraqi Republic (1958-1968)
- Ba'athist Iraq (1968-2003)
- Saddam Hussein is President of Iraq (1979-2003)
- Iran-Iraq War (1980-1988)
- Al-Qaeda (1988 - now)
- Iraq invades Kuwait (1990)
- Gulf War (1991)
- Iraq War (2003-2011)
- Iraqi Civil War (2006-2008)
- Islamic State of Iraq (2006 - now)
- Iraq war with Islamic State (2013-2017)
- Anbar campaign (2013-2014)
- Iraqi protests (2015-2018)
- ISIL insurgency in Iraq (2017 - now)
(This post includes any nation or civilization that occupied at least a portion of Iraq at some point. Unless specified otherwise, the dates correspond to when a nation or civilization existed, but do not necessarily correspond to occupation of Iraq.)
