May 4, 1924, Massacre of 4th May, 1924; Iraqi Levies, supported by the British, massacre an estimated 200 people after a Turkmen shop keeper and Levi soldier get into an argument.
August 1933, the Simele massacre in Northern Iraq: the Iraqi army massacred 600–3,000 Assyrian Christians.
June 1–2, 1941, Farhud, Baghdad; 175-780 deaths, considered "the beginning of the end of the Jewish community of Iraq".
July 14, 1959, Kirkuk massacre of 1959; Kurdish members from the Iraqi Communist Party target Turkmens leaving an estimated 20 dead. This was followed by Kurdish soldiers from the Fourth Brigade targeting Turkmen residential areas with mortars, causing the destruction of 120 homes. Between 31-79 Turkmen were killed with 130 wounded. The Iraqi government referred to the incident as a "massacre".[3]
September 16, 1969, Iraq’s Ba’ath regime massacred thousands of innocent Assyrian, Chaldean, Kurdish and Muslim men, women and children in the village of Surya. The first victim of the tragedy was the priest Hana Qasha, who was executed by the Iraqi officer Abdul Karim Al-Jihayshi.[4]
1975, Najaf purges. Over 100 Shi’ite clerics killed and 1250 arrested.
February 5 1977, Safar uprising. Despite brutally enforced ban on public religiousness, thousands of people defy it and head to Karbala during the Arba'een Pilgrimage. Hundreds were killed and thousands arrested by the regime.
March 16, 1988, Halabja poison gas attack, Halabja: 5,000+ deaths; Iraqi government used chemical weapons on Kurdish town; condemned as an act of genocide (The aforementioned Anfal genocide).
April 23, 2007, 2007 Mosul massacre, Mosul; 23 died; the murders were considered to be a reprisal for the honor killing of a 17-year-old Yazidi girl.
On April 17, 2007, 51 bodies of Iraqi civilians and military personnel, who were killed in the previous two years, were found in Mahmudiya, south of Baghdad.
June 29, 2007, Al Ahamir Massacre, Al Ahamir, 10-14 Iraqi civilians were killed by Al Qaeda.
On June 30, 2007, 35 to 40 bodies were recovered from a recently dug mass grave in the town of Ferris, south of Fallujah, most likely victims of sectarian violence.
July 16, 2007, massacre of Shiite villagers in a village in Diyala province on by Sunni insurgents, 29 killed.[19]
On April 4, 2010 Insurgents dressed as US and Iraqi soldiers killed 25 people including 5 women in a village south of Baghdad. They were linked to the Awakening movement. They were hand cuffed and shot in the head or chest. Seven were found alive in handcuffs. Major General Qassim Atta spokesman for the Iraqi security forces' Baghdad operations said Al-Qaeda in Iraq was behind this.[20][21]
12–15 June 2014 Camp Speicher massacre |Tikrit; the Islamic State with the help the Sunni local tribes killed at least 1,700 unarmed Iraqi Air Force cadets. They were separated by sect: Sunnis were allowed to repent for their military service, while Shiites were lined up for firing squads. The soldiers were separated into small groups, executed and buried in mass graves.