Throughout the 20th century, Iraq witnessed multiple periods of instability and conflict that prompted the creation and flight of many refugees. Earlier examples include the exodus of Iraqi Jews and the flight of Iraqi Kurds. The Iraqi invasion of Iran in 1980 and the ensuing Iran–Iraq War (1980–1988) triggered a deterioration of ties among the country's various ethnic and religious communities, and also exacerbated in violent events like the Ba'athist Arabization campaigns in northern Iraq (1968–2003), which led to the killing and displacement of thousands of minorities. The Iraqi invasion of Kuwait (1990) and the ensuing Gulf War (1990–1991), which ended with Iraq's defeat and the application of United Nations sanctions (1991–2003), also resulted in the creation of many Iraqi refugees. It was not until the beginning of the ongoing Iraqi conflict, however, that sustained waves of Iraqi refugees would be created, numbering in the millions: the 2003 invasion of Iraq and the ensuing Iraq War (2003–2011) killed and displaced hundreds of thousands of Iraqis, both internally and externally, and the later War in Iraq (2013–2017) forced even more people to flee from the country. Many Iraqi refugees established themselves in urban areas of other countries rather than in refugee camps.
In April 2007, there were approximately four million Iraqi refugees around the world, including: 1.9 million within Iraq; two million in neighbouring Arab countries, as well as in Iran and Turkey; and approximately 200,000 outside of the Middle East entirely. The United Nations High Commissioner for Refugees (UNHCR) has led the humanitarian efforts for Iraqi refugees. The number of displaced persons and refugees from the Iraqi conflict is considered to be the largest in the Middle East, though this figure may now be lower than that of the refugees of the Syrian civil war.
