The Anfal campaign was a counterinsurgency operation, described by many scholars and human rights groups as a genocide or ethnic cleansing, which was carried out by Ba'athist Iraq from February to September 1988 during the Iraqi–Kurdish conflict at the end of the Iran–Iraq War. The campaign targeted rural Kurds because its purpose was to eliminate Kurdish rebel groups and Arabize strategic parts of the Kirkuk Governorate. The Ba'athist regime committed atrocities on the local Kurdish population, mostly civilians. Although primarily targeting Kurds, other non-Arabs also fell victim to the Anfal campaign.

The Iraqi forces were led by Ali Hassan al-Majid, on the orders of President Saddam Hussein. The campaign's name was taken from the title of the eighth chapter of the Qur'an (al-ʾanfāl).

In 1993, Human Rights Watch released a report on the Anfal campaign based on documents captured by Kurdish rebels during the 1991 uprisings in Iraq; HRW described it as a genocide and estimated between 50,000 and 100,000 deaths. This characterization of the Anfal campaign was disputed by a 2007 Hague court ruling, which stated that documentary evidence was sufficient to establish the charge of genocide. Although many Iraqi Arabs reject that there were any mass killings of Kurdish civilians during Anfal, the event is an important element constituting Kurdish national identity.

Following the Iraqi invasion of Iran in 1980, the rival Kurdish opposition parties in Iraq—the Patriotic Union of Kurdistan (PUK) and Kurdistan Democratic Party (KDP) as well as other smaller Kurdish parties—experienced a revival in their fortunes. Kurdish fighters (peshmerga) fought a guerrilla war against the Iraqi government and established effective control over the Kurdish-inhabited mountainous areas of northern Iraq. As the war went on and Iran counterattacked into Iraq, the peshmerga gained ground in most Kurdish-inhabited rural areas while also infiltrating towns and cities. In 1983, after the joint KDP-Iranian capture of Haj Omran, the Iraqi government arrested 8,000 Barzani men and executed them. During the battle for Haj Omran, the Iraqi government also used gas weapons for the first time against both Kurdish and Iranian forces.

"Al Anfal", literally meaning the spoils (of war), was used to describe the military campaign of extermination and looting against the Kurds. It is also the title of the eighth sura, or chapter, of the Qur'an which describes the victory of 313 followers of the new Muslim faith over almost 900 non-Muslims at the Battle of Badr in 624 AD. According to Randal, Jash (Kurdish collaborators with the Baathists) were told that taking cattle, sheep, goats, money, weapons and even women was halal (religiously permitted or legal).^{[better source needed]}

The Anfal campaign began in February 1988 and continued until August or September and included the use of ground offensives, aerial bombing, chemical warfare, systematic destruction of settlements, mass deportation and firing squads. The campaign was headed by Ali Hassan al-Majid who was a cousin of Iraqi President Saddam Hussein from Saddam's hometown of Tikrit.

The Iraqi Army was supported by Kurdish collaborators whom the Iraqi government armed, the so-called Jash forces, who led Iraqi troops to Kurdish villages that often did not figure on maps as well as to their hideouts in the mountains. The Jash forces frequently made false promises of amnesty and safe passage. There were some Yazidi collaborators. The Iraqi government offered not to attack Yazidis if they participated in the Anfal campaign yet Yazidis were still a victim and target to the campaign. Yazidi special detachments were formed to "pursue and attack" Muslim Kurds. They were separate from the NDB, which consisted of Muslim Kurds. There was also Yarsani collaborators after some Yarsani religious leaders openly sided with the Iraqi government. They were rather taken advantage of, as Ali Hassan al-Majid stated that "we must Arabize the area, and only real Arabs - not Yazidis who one day say that they are Kurds and the next that they are Arabs. We turned a blind eye to the Yazidi people joining the jahsh in the beginning, in order to stop the saboteurs from growing. But apart from that, what use are the Yazidis? No use." Iraqi state media extensively covered the Anfal campaign using its official name. Approximately 1,200 Kurdish villages were destroyed during the Anfal campaign. To many Iraqis, Anfal was presented as an extension of the ongoing Iran–Iraq War, although its victims were overwhelmingly Kurdish civilians.

In March 1987, Ali Hassan al-Majid was appointed secretary-general of the Ba'ath Party's Northern Bureau, which included Iraqi Kurdistan.